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1Z0-054 | Oracle Database 11g Performance Tuning

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1Z0-054 - Oracle Database 11g Performance Tuning - braindump

Vendor Oracle
Exam Number 1Z0-054
Exam Name Oracle Database 11g Performance Tuning
Questions 192 Q & A
Recent Update May 15, 2019
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Test Code : 1Z0-054
Test Name : Oracle Database 11g Performance Tuning
Vendor Name : Oracle
Q&A : 192 Real Questions

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Oracle Database 11g Performance Tuning education

I/O efficiency Tuning tools for Oracle Database 11gR2 | 1Z0-054 Real Questions and VCE Practice Test

Oracle Database 11g unlock 2 (11gR2) makes it more convenient than ever to isolate and establish skills root explanations of poor I/O performance. this text specializes in the a variety of Oracle and non-Oracle equipment to generate pattern workloads to give adequate metrics for detection and eventual decision of performance bottlenecks within the database’s underlying enter/output (I/O) subsystem.

Synopsis. Tuning the I/O efficiency of an Oracle 11gR2 database is still just as much artwork as science. Oracle 11g liberate 2 (11gR2) makes it easier than ever, besides the fact that children, to isolate and identify skills root explanations of negative I/O efficiency. this article – the second during this sequence – focuses on the a variety of Oracle and non-Oracle equipment to generate sample workloads to give sufficient metrics for detection and eventual decision of efficiency bottlenecks inside the database’s underlying input/output (I/O) subsystem.

The prior article during this sequence discussed tons of the thought in the back of I/O performance tuning, notably as it concerning Oracle 11gR2 database applications. this article will handle a couple of key purposeful ideas, together with how to:

  • Measure expected and genuine I/O efficiency using dependent I/O monitoring tools
  • Create pre-database and post-database I/O performance workloads
  • Let’s start off with a discussion of a way to display screen all the essential add-ons of any I/O subsystem by way of a plethora of obtainable equipment – some more refined than others. I’m going to focal point on the Linux operating equipment for this text series, but corollary utilities in most situations exist in the home windows OS atmosphere and positively exist in all UNIX OS environments.

    I/O performance Monitoring tools

    most of the equipment that Oracle DBAs continue to make use of for I/O efficiency monitoring present the ability to reveal ample I/O tuning counsel from deep in the working device. These equipment ruin down into two primary corporations:

    Command-Line tools. These legitimate regular command-line equipment have been round considering the fact that the crack of dawn of computing (smartly, as a minimum for the reason that green characters have been typed upon black backgrounds). seeing that they're character-based mostly, although, they don’t present an awful lot in the approach of slick reveal; in spite of this, they tend to current a comparatively small memory footprint - and that can be critical when attempting to investigate an I/O performance problem that’s masquerading as a memory-certain or CPU-sure issue. here are just a few of my favorites:

  • doubtless the premier-popular utility, iostat lets me view basic or extended data concerning the actual storage devices that my server is aware about. as an example, i will educate iostat to appear on the number of transactions per second (TPS), the variety of OS blocks read or written, and the expense at which they’re written (blocks per 2nd). i can additionally tell iostat to always display screen selected instruments for a specific number of repetitions. I’ve captured some samples of iostat execution in checklist 2.1.1.
  • Likewise, the vmstat utility presents the capability to see complete reads and writes to physical instruments (via the –d alternative) and for a specific partition (via the –p option). a couple of samples of vmstat execution are shown in checklist 2.1.2.
  • even though used less often, the sar utility (via the –b choice) can also be used to dump historic advice about transactions per 2nd, reads and writes per second, and block reads and writes per 2nd from the gadget structure historical past info. I’ve proven consequences from a pattern sar -b execution in listing 2.1.three.
  • Oracle-based mostly equipment. now not fairly, the Oracle Database application itself additionally presents a couple of I/O efficiency monitoring tools.

  • enterprise supervisor (EM). ASM turned into first brought in Oracle 10gR1. Concurrent with its free up, Oracle DBAs had been ultimately in a position to graphically view I/O undertaking and information with full drill-down ability to the ASM disk neighborhood and ASM disk stage. determine 2.1 below suggests a summary monitor from Oracle 11gR2 EM to demonstrate the stage of I/O performance aspect for ASM:
  • determine 2.1: business manager ASM I/O performance details.

    starting in Oracle 11gR1, EM also offered the means to view I/O information from a number of different views, including within history and foreground process class, I/O class, and even resource consumer community. I’ve covered a number of pattern monitors beneath to display this 11g characteristic, and that i’ll be the use of this significantly in future articles to examine and drill down via true-time I/O efficiency metrics.

    determine 2.2: business supervisor I/O performance information inside I/O characteristic.

    figure 2.three: business supervisor I/O efficiency records within I/O class.

  • automatic Workload Repository (AWR) reports. additionally launched in Oracle 10gR1, AWR studies offer the means to look study and write I/O facts on the tablespace and datafile level. And the same I/O profiling tips existing in Oracle 11gR2 EM is additionally captured inside each AWR report during this unlock, as shown in this sample AWR document. (notice that AWR’s older and feebler brother, StatsPack, additionally offers an identical but greater limited views into tablespace and datafile I/O endeavor.)
  • ASMCMD: iostat. starting in Oracle 11gR2, the ASMCMD command-line utility offers the iostat subcommand for any ASM file systems that are available. remember that ASMCMD have to be invoked from a terminal session that’s logged as the proprietor of the Oracle 11gR2 Grid Infrastructure home (typically, the grid person account) – not because the proprietor of the Oracle database domestic. I’ve pulled collectively a few examples of how this tips will also be captured and displayed in checklist 2.2.
  • SQL*Plus Queries. on the grounds that the inception of ASM in Oracle 10gR1, the Oracle ASM instance has at all times exposed all ASM-related counsel through a couple of dynamic views. I’ve regularly written reviews directly in opposition t these views to reap the tips i needed within the layout desired. I’ve blanketed a couple of queries in listing 2.3.1 and corresponding pattern output from these queries in listing 2.three.2.
  • I/O era equipment: extra-Database

    a few equipment are positive for what i like to name “extra-database” analysis. In different words, these tools can be used to generate an I/O workload from outside an Oracle database atmosphere. youngsters, these tools should be used cautiously – and possibly on no account within a construction database environment! – because they actually could care less concerning the state of any extant Oracle database info.

  • The venerable dd command can basically be used as a crude I/O load generation device. It’s basic to make use of, comes free with Linux (and with most flavors of Unix). be aware that whereas there isn't any such corollary device as dd for the home windows OS, it’s viable to use Linux emulators like MKS Toolkit to give identical performance.
  • vdbench is a free load technology device at first created with the aid of sun Microsystems that’s favored with the aid of many storage administrators and that i/O efficiency experts among the many largest storage companies (e.g., EMC, Hitachi, IBM, NetApp) for generating giant, predictable, and complicated I/O workloads. it might probably even be run in opposition t either windows-primarily based, UNIX-based mostly, or Linux-based mostly “cooked” file methods, in addition to “raw” file methods, and it also presents a rudimentary GUI for efficiency examine execution. best of all, it’s extremely smartly-documented. Vdbench also presents some striking I/O efficiency stories and true-time efficiency monitoring capabilities. I’ll display some examples of using vdbench to generate severe I/O workloads in future articles in this sequence.
  • ORION. The Oracle enter/Output Numbers calibration tool is a fairly naked-bones, freely-presented set of tools available from Oracle expertise community. ORION has been around for many years, and it supports each most important OS and hardware atmosphere that Oracle databases run on, together with UNIX, Linux, and home windows. It’s additionally elementary to installation – on Linux, it’s just an executable file – and relatively easy to configure. The documentation offered is slightly sparse, but more than enough for constructing ORION readily and without delay.
  • by the way, in my view the documentation on ORION is barely a bit too refined on what it does “under the covers” to give a write-intensive workload. right here’s a snippet from the output that pops up when I invoked the 64-bit edition of ORION from a terminal window:

    [oracle@11gR2Base ~]$ ./orion_x86_64 ORION: ORacle IO Numbers -- edition 11.1.0.7.0 Parse error: View assist screen the usage of ./orion_x86_64 -support. [oracle@11gR2Base ~]$ ./orion_x86_64 -aid ORION: ORacle IO Numbers -- version 11.1.0.7.0 ORION runs IO performance checks that model Oracle RDBMS IO workloads. It measures the performance of small (2-32K) IOs and big (128K+) IOs at numerous load stages. each and every Orion data factor is performed at a selected mixture of small and big IO masses sustained for a period. anyplace from a single statistics aspect to a two-dimensional array of information aspects can be verified by surroundings the appropriate alternate options. An Orion check carries records facets at a variety of small and big IO load tiers. These points will also be represented as a two-dimensional matrix: each and every column within the matrix represents a set small IO load. every row represents a fixed gigantic IO load. the primary row is and not using a tremendous IO load and the first column is without a small IO load. An Orion verify can be a single point, a row, a column or the entire matrix. The 'run' parameter is the only necessary parameter. Defaults are indicated for all different parameters. For additional info on the person interface, see the Orion consumer e book. <testname> is a filename prefix. by means of default, it is "orion". It can be special with the 'testname' parameter. <testname>.lun may still comprise a carriage-return-separated checklist of LUNs The output data for a examine run are prefixed by means of <testname>_<date> where date is "yyyymmdd_hhmm". The output data are: <testname>_<date>_summary.txt - summary of the enter parameters together with min. small latency, max gigantic MBPS and/or max. small IOPS. <testname>_<date>_mbps.csv - performance outcomes of big IOs in MBPS <testname>_<date>_iops.csv - performance results of small IOs in IOPS <testname>_<date>_lat.csv - Latency of small IOs <testname>_<date>_tradeoff.csv - suggests big MBPS / small IOPS combinations that can also be finished at definite small latencies <testname>_trace.txt - prolonged, unprocessed output WARNING: if you are PERFORMING WRITE checks, BE organized TO LOSE ANY records stored ON THE LUNS. necessary parameters: run type of workload to run (simple, normal, advanced, dss, oltp) fundamental - checks random 8K small IOs at a considerable number of masses, then random 1M tremendous IOs at quite a lot of hundreds. average - checks mixtures of random 8K small IOs and random 1M big IOs advanced - run the workload unique through the person the use of not obligatory parameters dss - run with random 1M large IOs at expanding hundreds to verify the maximum throughput oltp - run with random 8K small IOs at increasing loads to investigate the optimum IOPS optional parameters: testname identify of the test run num_disks variety of disks (actual spindles). Default is the number of LUNs in <testname>.lun size_small size of small IOs (in KB) - default eight size_large size of enormous IOs (in KB) - default 1024 category category of big IOs (rand, seq) - default rand rand - Random enormous IOs seq - Sequential streams of large IOs num_streamIO variety of concurrent IOs per movement (handiest if type is seq) - default 4 simulate Orion assessments on a digital quantity fashioned by means of combining the supplied volumes in a single of these ways (default concat): concat - A serial concatenation of the volumes raid0 - A RAID-0 mapping across the volumes write percent of writes (SEE WARNING ABOVE) - default 0 cache_size size *IN MEGABYTES* of the array's cache. unless this option is set to 0, Orion does a few (unmeasured) random IO earlier than each large sequential facts point. here's done as a way to refill the array cache with random information. this manner, the blocks from one statistics point don't outcome in cache hits for the subsequent information element. read assessments are preceded with junk reads and write tests are preceded with junk writes. If specific, this 'cache warming' is performed unless cache_size price of IO has been examine or written. Default conduct: replenish cache for 2 minutes earlier than each records point. period period of each facts element (in seconds) - default 60 num_small variety of excellent small IOs (simplest if matrix is aspect, col, or max) - no default num_large For random, variety of surprising gigantic IOs. For sequential, variety of streams (best if matrix is aspect, row, or max) - no default matrix An Orion verify contains data points at quite a few small and massive IO load tiers. These aspects can be represented as a two-dimensional matrix: each column within the matrix represents a hard and fast small IO load. each and every row represents a set colossal IO load. the primary row is with out a significant IO load and the primary column is with no small IO load. An Orion examine can also be a single point, a row, a column or the complete matrix, depending on the matrix choice setting beneath (default simple): simple - look at various the first row and the primary column precise - test the total matrix factor - check at load stage num_small, num_large col - varying tremendous IO load with num_small small IOs row - varying small IO load with num_large gigantic IOs max - test varying masses as much as num_small, num_large verbose Prints tracing suggestions to ordinary output if set. Default -- not set Examples For a preliminary set of facts -run simple For a fundamental set of facts -run commonplace To evaluate storage for an OLTP database -run oltp To consider storage for a knowledge warehouse -run dss To generate combinations of 32KB and 1MB reads to random areas: -run advanced -size_small 32 -size_large 1024 -classification rand -matrix particular To generate diverse sequential 1MB write streams, simulating 1MB RAID0 stripes -run superior -simulate RAID0 -stripe 1024 -write a hundred -type seq -matrix col -num_small 0

    I’ll likewise exhibit the use of ORION in future articles in this sequence, so please live tuned.

    I/O generation tools: Freeware

    What if I deserve to trap and then regenerate a particular software workload? There are a couple of tools accessible:

  • The Transaction Processing Council (TPC) gives a series of scriptsthat may also be used to assemble and cargo an Oracle database of an supposed measurement and application workload “intent” (e.g. OLTP, OLAP). as soon as a database of an appropriate type is created, TPC does deliver huge documentation for its a lot of workloads, together with its TPC-C (OLTP), TPC-E (prolonged OLTP), and TPC-H (facts warehousing / resolution support) software database fashions. The TPC-E despite the fact, TPC best offers one tool that will also be publicly downloaded for TPC-E utility workload technology, and that needs to be compiled using Microsoft’s visual Studio and C++. I’ll exhibit the way to deploy these schemas within the very next article, and i’ll demonstrate using an identical load era device in future articles as smartly.
  • Swingbench is an additional typical freeware tool for load technology. Written via ordinary author and blogger Dominic Giles, it also provides command-line as well as GUI interfaces for growing some relatively refined workloads for Oracle 9i, 10g, and 11g databases. I’ll show Swingbench’s capabilities in a future article during this sequence.

  • I/O era tools: no longer-So-Freeware

    What if I need to catch and then regenerate a specific application workload, and that i have enormous budget to spend doing that? whereas free equipment are wonderful, the historical asserting that “You get what you pay for” actually holds genuine right here … peculiarly when support for a technical problem or particular trying out case warrants outside assist. The first rate news here is that there are several tools available; here are three of my favorite ones:

  • Mercury Interactive at the beginning developed the LoadRunner device many years in the past, and Hewlett Packard now owns it. it's in fact essentially the most mature device during this community. LoadRunner basically captures application keystrokes and allows for me to replay a workload the use of those keystrokes as a user profile, and then crank up distinctive versions of that workload – say, 20 OLTP users, 5 DSS clients, three OLAP clients, and two DBAs – in opposition t an Oracle database. however, the charge for such a complicated tool can conveniently run to 6 figures; furthermore, it can now not be the top-quality option to capture and replay an I/O performance workload as a result of what I really want to reproduction is the I/O profile generated through the SQL statements being executed in opposition t the database, no longer necessarily the actual software keystrokes.

  • Quest application’s Benchmark manufacturing facility is among the more refined equipment for producing I/O workloads I’ve encountered. I’ve used both the 30-day trial version (which is quite effective!) in addition to a fully-licensed edition to generate extraordinarily enormous I/O efficiency workloads. It also makes short work of creating and loading an preliminary TPC-C, TPC-H, or SPC-1 mannequin database that conforms to official standards for correlative comparisons of I/O workloads between fully different I/O subsystem configurations. Benchmark manufacturing unit presents quite an intuitive GUI, makes it possible for extensive modifications to average workloads in that case preferred, and features staggering reporting and graphing capabilities. once more, be mindful that Benchmark manufacturing facility is the rest but free, and its licensing fees - plus the hardware to run Benchmark manufacturing unit agents to generate the mandatory I/O performance workloads! - can effortlessly run into six-figure USD tiers.

  • finally, I’d be remiss to ignore Oracle Database Replay (DBR). DBR does require additional Oracle utility licensing, however may additionally neatly be price evaluating as an alternative choice to each LoadRunner and Benchmark factory in terms of ordinary charge. DBR become first purchasable in Oracle 11gR1; I’ve written about it radically in a previous three-part article collection. DBR’s primary performance hasn’t changed dramatically in Oracle 11gR2, with one excellent exception: It’s now feasible to scale up a question workload according to a presented multiplier aspect. (For glaring explanations, this wouldn’t work very neatly for DML statements!) I’ll leverage that capacity in a future article inside this sequence.

  • subsequent Steps

    Now that I’ve covered some of the more typical I/O load era and efficiency testing equipment, it’s time to in reality address some precise-world testing. The subsequent article is this sequence will focus on the way to:

  • put in force an extra-database I/O efficiency test
  • Measure the results of an additional-database I/O efficiency check
  • Create and load pattern TPC-C and TPC-H database schemas previous to intra-database I/O performance assessments
  • References and further studying

    before you proceed to test with any of these new aspects, I strongly imply that you simply first look over the corresponding targeted Oracle documentation earlier than attempting them out for the first time. I’ve drawn upon here Oracle Database 11g release 2 documents for this text’s technical details:

    E10881-02 Oracle Database 11gR2 New facets

    E10595-05 Oracle Database 11gR2 Administrator’s ebook

    E10713-03 Oracle Database 11gR2 ideas

    E10820-02 Oracle Database 11gR2 Reference

    E10500-02 Oracle Database 11gR2 Storage Administrator’s ebook

    E10577-05 Oracle Database 11gR2 PL/SQL packages and kinds Reference

    » See All Articles by way of Columnist Jim Czuprynski


    Oracle Certification ebook: Overview and career Paths | 1Z0-054 Real Questions and VCE Practice Test

    Oracle offers a mess of hardware and application solutions designed to simplify and empower IT. possibly premier primary for its premier database software, the enterprise additionally offers cloud options, servers, engineered techniques, storage and more. Oracle has more than 430,000 clients in one hundred seventy five nations, about 138,000 personnel and exceeds $37.7 billion in revenue.

    through the years, Oracle has developed an in depth certification software. today, it comprises six certification levels that span 9 different classes with more than 200 particular person credentials. for the reason that the depth and breadth of this program, and the number of Oracle valued clientele, it be no shock that Oracle certifications are extremely widespread.

    Oracle certification software overview

    Oracle's certification software is split into these nine primary categories:

  • Oracle purposes
  • Oracle Cloud
  • Oracle Database
  • Oracle enterprise administration
  • Oracle Industries
  • Oracle Java and Middleware
  • Oracle operating methods
  • Oracle systems
  • Oracle Virtualization
  • moreover, Oracle's credentials are offered at six certification degrees:

  • Junior affiliate
  • affiliate
  • knowledgeable
  • grasp
  • expert
  • expert
  • Most Oracle certification exams are proctored, charge $245, and include a mixture of scored and unscored numerous-choice questions. Candidates may additionally take proctored checks at Pearson VUE, although some tests are offered at Oracle testing facilities in certain locations. Some assessments, akin to Oracle Database 12c: SQL Fundamentals (1Z0-061) and Oracle Database 11g: SQL Fundamentals (1Z0-051), are also accessible non-proctored and can be taken online. Non-proctored assessments charge $125. verify the Oracle institution Certification website for details on selected assessments.

    Oracle applications and Cloud certifications

    The Oracle applications certification category offers greater than 60 particular person credentials throughout 13 items or product companies, comparable to Siebel, E-enterprise Suite, Hyperion, JD Edwards EnterpriseOne and PeopleSoft. the majority of these certifications confer certified Implementation specialist for some selected software, with various certified skilled credentials also attainable. The software certifications intention at individuals with talents in selling and implementing selected Oracle options.

    Oracle's most recent certification class is Oracle Cloud, which covers Java Cloud in addition to a number of Oracle Cloud certifications, including Oracle Database Cloud. Cloud certs fall into seven sub-classes:

  • Infrastructure as a service (IaaS)
  • Platform as a carrier (PaaS), together with statistics administration, application construction, management Cloud and cell Cloud provider
  • application as a provider (SaaS) – Oracle consumer journey Cloud, including provider, earnings, advertising and marketing and CPQ Cloud
  • application as a carrier – Oracle performance management Cloud, including efficiency Reporting, commercial enterprise Planning and Budgeting, monetary Consolidation and shut, Profitability and value management Cloud
  • application as a functions – Oracle enterprise useful resource Planning Cloud, including Financials, undertaking Portfolio management, Procurement and risk management Cloud
  • software as a carrier – Oracle Human Capital management Cloud, together with staff Rewards, Payroll, ability management and global Human elements Cloud
  • utility as a provider – Oracle deliver Chain administration Cloud, including Order administration, Product grasp records management, Product Lifecycle administration, Manufacturing, stock management, give Chain Planning and Logistics Cloud
  • These credentials recognize individuals who set up applications, function administration or convey client solutions within the cloud. Credentials usually consist of associate and Certification Implementation consultants, with one mobile Developer credential offered plus a professional-degree Oracle Database Cloud Administrator.

    Oracle Database certifications

    Certifications in Oracle's Database category are geared toward people who boost or work with Oracle databases. There are three leading categories: Database application development, MySQL and Oracle Database.

    observe: Oracle Database 12c turned into redesigned for cloud computing (and is protected in each the Cloud and Database certification classes). The present edition is Oracle Database 12c R2, which incorporates further enhancements for in-memory databases and multitenant architectures. MySQL 5.6 has been optimized for performance and storage, so it could tackle larger facts sets.

    on every occasion a major version of either database is released, Oracle updates its certifications checks over time. If an examination is rarely attainable for the latest release, candidates can take a outdated edition of the examination after which an updated examination when it turns into available. although MySQL 5.6 certifications and exams are still obtainable for candidates supporting that edition, the new MySQL 5.7 certification track may be more acceptable for these simply beginning on their MySQL certification journeys.

    Oracle currently presents the Oracle Database Foundations licensed Junior affiliate, Oracle certified affiliate (OCA), Oracle certified skilled (OCP), Oracle certified grasp (OCM), Oracle certified expert (OCE) and professional paths for Oracle Database 12c. additionally, Oracle offers the OCA credential for Oracle Database 12c R2 and an improve direction for the OCP credential. as a result of many of these certifications are also widespread within the Oracle Certification application, we deliver extra examination particulars and hyperlinks in here sections.

    different database certifications Oracle business management Certifications

    The Oracle business manager Certification route presents candidates the probability to display their abilities in utility, middleware, database and storage management. The Oracle enterprise manager 12c licensed Implementation expert examination (1Z0-457) certifies a candidate's potential in physical, virtual and cloud environments, as well as design, installation, implementation, reporting, and help of Oracle business manager.

    Oracle Database Foundations licensed Junior associate

    The Oracle Database basis licensed Junior associate credential goals people that've participated within the Oracle Academy through a university or tuition software, desktop science and database academics, and people learning databases and desktop science. As a newbie-level credential, the licensed Junior associate is intended for people with constrained fingers-on experience engaged on Oracle Database items. To earn this credential, candidates ought to move the Oracle Database Foundations (amateur-degree exam) (1Z0-006).

    Oracle certified associate (OCA) – Oracle Database 12c Administrator

    The OCA certification measures the everyday operational management database competencies of DBAs. Candidates should pass a SQL examination and one more on Oracle Database administration. Candidates can opt for one of here SQL tests:

  • Oracle Database 12c SQL (1Z0-071)
  • Oracle Database 12c: SQL Fundamentals (1Z0-061) be aware: This examination should be retired on November 30, 2019.
  • Candidates ought to additionally pass the Oracle Database 12c: setting up and Administration (1Z0-062) examination.

    Oracle licensed associate – Oracle Database 12cR2 Administrator

    To earn the Oracle Database 12cR2 OCA credential, candidates must first earn both the Oracle Database SQL licensed affiliate, Oracle Database 11g Administrator licensed associate, or the Oracle Database 12c Administrator certified affiliate.  additionally, candidates are required to pass the Oracle Database 12cR2 Administration examination (1Z0-072).

    Oracle certified skilled (OCP) – Oracle Database 12c Administrator

    The OCP certification covers greater superior database advantage. You have to have the OCA Database 12c Administrator certification, finished the required practicing, submit a path submission kind and circulate the Oracle Database 12c: superior Administration (1Z0-063) exam.

    authorities who possess both the Oracle Database 11g Administrator certified expert or Oracle Database 12c Administrator certified expert credential might also upgrade to the Oracle Database 12cR2 Administration licensed expert credential through passing the Oracle DBA upgrade examination (1Z0-074).

    Oracle certified master (OCM) – Oracle Database 12c Administrator

    To obtain OCM Database 12c Administrator certification, you have to have the OCP Database 12c Administrator certification, complete two superior classes, and circulate the Oracle Database 12c licensed master exam (12cOCM), complete the course submission form, and publish the fulfillment kit request.

    Oracle also offers the Oracle Database 12c highest Availability licensed master certification, which requires three separate credentials, together with the Oracle Database 12c Administrator certified grasp, Oracle certified skilled, Oracle Database 12c-RAC and Grid Infrastructure Administration, and Oracle licensed expert, Oracle Database 12c – statistics take care of Administration.

    Oracle certified expert (OCE) – Oracle Database 12c

    The OCE Database 12c certifications encompass highest Availability, records shield Administrator, RAC and Grid Infrastructure Administrator, and efficiency management and Tuning credentials. All these certifications involve prerequisite certifications. efficiency administration and Tuning takes the OSP Database 12c as a prerequisite and the information protect Administrator certification requires the OCP Database 12c credential. The RAC and Grid Infrastructure Administrator gives candidates probably the most flexibility, enabling candidates to choose between the OCP Database 11g, OCP Databases 12c, Oracle certified skilled – real application Clusters 11g and Grid Infrastructure Administration.

    as soon as the prerequisite credentials are earned, candidates can then achieve statistics safeguard Administrator, RAC and Grid Infrastructure Administrator or efficiency administration and Tuning by way of passing one exam. attaining OCP 12c plus the RAC and Grid Infrastructure Administration and records preserve Administration certifications earns the optimum Availability credential.

    Oracle Database certified Implementation expert

    Oracle also presents three licensed Implementation professional credentials: the Oracle actual application Clusters 12c, Oracle Database efficiency and Tuning 2015, and Oracle Database 12c. expert credentials target people with a heritage in promoting and implementing Oracle solutions. each and every of these credentials requires candidates to flow a single examination to earn the designation.

    Oracle Industries certifications

    Oracle Industries is another widespread category, with greater than 25 particular person certifications focused on Oracle utility for the development and engineering, communications, health sciences, coverage, tax and utilities industries. All these certifications respect certified Implementation specialists for the quite a lot of Oracle business items, which skill they identify individuals trained in implementing and selling business-particular Oracle utility.

    Oracle Java and Middleware Certifications

    The Java and Middleware certifications span a number of subcategories, reminiscent of business Intelligence, software Server, Cloud software, data Integration, id administration, mobile, Java, Oracle Fusion Middleware building tools and extra. Java and Middleware credentials symbolize all tiers of the Oracle Certification application – associate, skilled and so forth – and include Java Developer, Java Programmer, device Administrator, Architect and Implementation specialist.

    The highly popular Java class has certifications for Java SE (normal edition), and Java EE (business version) and web features. a couple of Java certifications that require a previous certification accept either the corresponding sun or Oracle credential.

    Oracle operating systems certifications

    The Oracle operating techniques certifications encompass Linux and Solaris. These certifications are geared toward administrators and implementation consultants.

    The Linux 6 certifications encompass OCA and OCP Linux 6 equipment Administrator certifications, as well as an Oracle Linux certified Implementation specialist certification. The Linux 6 professional is geared to companions however is open to all candidates. both the Linux OCA and professional credentials require a single exam. To achieve the OCP, candidates should first earn either the OCA Linux 5 or 6 equipment Administrator or OCA Linux Administrator (now retired) credential, plus move an examination.

    The Solaris 11 certifications consist of the OCA and OCP gadget Administrator certifications plus an Oracle Solaris eleven installation and Configuration certified Implementation expert certification. The OCA and OCP Solaris 11 equipment Administrator certifications determine Oracle Solaris 11 directors who have a fundamental abilities of and base-level skills with the UNIX working gadget, instructions, and utilities. As indicated by its identify, the Implementation expert cert identifies intermediate-level implementation crew participants who deploy and configure Oracle Solaris 11.

    Oracle programs certifications

    Oracle systems certifications consist of Engineered methods (large facts appliance, Exadata, Exalogic Elastic Cloud, Exalytics, and personal Cloud appliance), Servers (Fujitsu and SPARC) and Storage (Oracle ZFS, Pillar Axiom, Tape Storage, Flash Storage gadget). most of these certifications aim at people who promote and implement probably the most certain options. The Exadata certification subcategory additionally contains Oracle Exadata X3, X4 and X5 professional Administrator certifications for people who administer, configure, patch, and video display the Oracle Exadata Database computer platform.

    Oracle Virtualization certifications

    The Virtualization certifications cover Oracle virtual computer (VM) Server for X86. This credential is based on Oracle VM three.0 for X86, and recognizes individuals who promote and put in force Oracle VM solutions.

    The Oracle VM three.0 for x86 certified Implementation professional Certification goal at intermediate-level group participants informed in setting up OVM 3.0 Server and OVM three.0 supervisor accessories, discovering OVM Servers, configuring community and storage repositories and extra.

    connected jobs and careers

    The sheer breadth and depth of Oracle's certification application creates ample alternatives for professionals who are looking to work with Oracle applied sciences, or who already do and wish their capabilities diagnosed and validated. although there are lots of particular Oracle items wherein to specialise in varying capacities, the leading job roles include directors, architects, programmers/developers and implementation specialists.

    every company that runs Oracle Database, Oracle Cloud, or Oracle Linux or Solaris wants qualified administrators to deploy, keep, video display and troubleshoot these solutions. These equal companies also want architects to plot and design solutions that meet company needs and are applicable for the certain environments during which they're deployed, indicating that the alternatives for profession advancement in Oracle technologies are abundant.

    Job listings and hiring information point out that programmers and builders continue to be tremendously sought-after within the IT world. Programming and building potential are one of the vital most sought-after via hiring managers in 2019, and database administration is never a ways at the back of. a brief search on indeed results in well-nigh 12,000 hits for "Oracle developer," which is an outstanding indication of each need and possibility. not most effective do developers create and regulate Oracle utility, they regularly ought to know the way to design software from the floor up, package products, import information, write scripts and strengthen reports.

    And, of course, Oracle and its companions will all the time want implementation specialists to sell and install the company's options. This role is typically responsible for initiatives that need to be successfully accomplished to get a solution up and running in a client's atmosphere, from making a project plan and agenda, to configuring and customizing a device to in shape client standards.

    Oracle working towards and elements

    it's no longer astonishing that Oracle has an intensive library of examination preparation substances. check the Oracle college web site (education.oracle.com) for arms-on instructor-led practicing, virtual courses, practicing on demand, examination training seminars, practice tests and other training components.

    A candidate's highest quality bet, although, is to first select a certification direction after which observe the hyperlinks on the Oracle web page to the necessary examination(s). If practicing is advised or additional materials are available for a specific exam, Oracle lists them on the exam web page.

    another extremely good resource is the Oracle discovering Paths webpage, which provides a lengthy listing of Oracle product-related job roles and their advised courses.

    Ed TittelEd is a 30-year-plus veteran of the computing business. He has labored as a programmer, technical supervisor, school room instructor, network advisor and a technical evangelist for organizations that consist of Burroughs, Schlumberger, Novell, IBM/Tivoli and NetQoS. He has written for a large number of publications, together with Tom's IT seasoned, and is the writer of more than one hundred forty computing books on guidance protection, net markup languages and construction tools, and home windows operating systems.

    Earl FollisEarl is also a 30-12 months veteran of the computer business, who worked in IT practising, advertising, technical evangelism, and market analysis in the areas of networking and techniques technology and management. Ed and Earl met in the late Eighties when Ed hired Earl as a trainer at an Austin-area networking enterprise it really is now a part of HP. the two of them have written a large number of books together on NetWare, home windows Server and other themes. Earl is also an everyday creator for the computing device exchange press with many e-books, white papers and articles to his credit score.


    Stage three: cutting back physical IO | 1Z0-054 Real Questions and VCE Practice Test

    This chapter is from the publication 

    Now that the utility demand has been minimized, and competition that might otherwise mask that demand eliminated, we flip our consideration to decreasing the time spent watching for IO. In different phrases, earlier than making an attempt to in the reduction of the time taken for each IO (IO latency), we are trying to in the reduction of the quantity of IO. as it turns out, reducing the volume of IO almost always reduces the IO latency, so attacking the extent of IO first is doubly advantageous. Having reduced application demand through SQL tuning and other capacity, we now are trying to further in the reduction of IO by using configuring memory to cache and buffer IO requests.

    Most actual IO in an Oracle database occurs both as a result of an application session requests facts to fulfill a question or data amendment request, because the session must style or hash data, or ought to create a brief segment to help a huge be part of, ORDER by way of, or similar operation.

    Oracle's shared reminiscence (the SGA) outlets copies of facts blocks in reminiscence and eliminates the deserve to operate a disk IO if the requested statistics block is in that memory. appropriately allocating this reminiscence goes an extended approach towards minimizing disk IO.

    during the past, allocating SGA memory changed into successful-and-leave out affair. thankfully, in up to date Oracle the server can immediately adjust memory allocations for you, or you can measure the impact of adjusting the size of the quite a few reminiscence pools by using analyzing advisories, which accurately predict the impact of altering the sizes of those swimming pools.

    Oracle enables you to set up separate memory areas to cache blocks of distinct dimension and also allows you to nominate particular areas to cache information that might need to be kept in reminiscence. not all these reminiscence areas will be instantly and dynamically resized through Oracle, and Oracle will no longer instantly allocate the areas within the first place, or assign specific records segments to these areas; these tasks are left to the DBA.

    apart from disk reads when accessing data no longer within the shared memory, Oracle may function titanic IO when sorting or hashing information all the way through ordering, grouping, or be part of operations. the place feasible, Oracle performs a sort or hash operation in reminiscence inside the area of reminiscence allotted for software use—the program global area (PGA). although, if ample memory isn't accessible, Oracle writes to—and reads from—transient segments on disk to finished the kind or hash operation.

    Oracle has superior its ability to automatically control these reminiscence areas in most fresh releases. As of 10g, Oracle immediately resizes allocations in the PGA and the SGA, however will now not shift reminiscence between these areas. In 11g Oracle can stream memory between the PGA and SGA as required—or at the least, as Oracle calculates is required.

    regardless of the growth in automated memory management, there is still an awful lot for the Oracle administrator to do to be certain most effective efficiency. These tasks encompass

  • deciding upon whether the appropriate volume of OS memory is accessible to Oracle
  • selecting the proper division of memory between the PGA and SGA, or—in 11g—permitting Oracle's computerized reminiscence management to make that determination
  • quality-tuning the allocation of segments to specific memory areas
  • nice-tuning the parameters controlling sorting and joining
  • Monitoring Oracle's reminiscence allocations and over-using if essential
  • Chapters 18–20 cover these reminiscence optimization recommendations.


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