Improving Performance of E-Business SuiteApplications – Practical Tips from a DBAs Diary Session ID# 11573 Biju Thomas OneNeck IT Services Enterprise Hosted Application Management and Managed Services Provider
About the Speaker• Principal Solutions Architect with OneNeck IT Services• More than 19 years of Oracle Database Experience• Working with Oracle EBS databases and applications past 7 years. Always like to approach EBS from the database to application…• EBS expertise in setting up new environments, automation, cloning, troubleshooting and performance tuning• Author of Oracle11g OCA, co-author of Oracle10g, 9i, 8i OCP certification guides published by Sybex/Wiley.
Message…Do not shy away from exploring the database… • Lot of unanswered questions at the EBS application side can be answered at the database. Almost all of performance issues end up in the database. • Newer releases of databases collect large amount of performance related information. • Most of the time it is the custom code or incorrect profile options affecting performance…
Agenda…Finding expensive SQL – using AWRTying the SQL to an EBS jobSQL Queries to gather Concurrent Job informationFew major performance issues & resolutionPeriodic database maintenance for PerformanceOracle provided periodic EBS maintenance jobsMultiple Concurrent Manager lanes for performanceUpgrade database to 11gR2
AWR – Quick Overview • Automatic Workload Repository - Introduced in Oracle 10g • AWR is automatically installed and enabled, snapshot collection is scheduled • Information automatically populated by database – but need license to use information. • Baseline snapshots, compare two time periods • Use DBA_HIST_ views • Default keeps 7 days information – need to increase to at least a month to help analysis • Fully integrated in OEM • Captures resource intensive SQLs, Object usage statistics • Pay attention to Tablespase I/O, SGA/PGA sizing recommendations! @$ORACLE_HOME/rdbms/admin/awrrpt.sql, awrsqrpt.sql, awrddrpt.sql
The “Dirty” SQL• High buffer gets – LIO SELECT * FROM ( SELECT sql_id,• Use DBA_HIST_SQLSTAT module,• Captures the statistics information SUM (nvl(buffer_gets_delta,0)) bget, from V$SQL SUM (nvl(executions_delta,0)) exec, SUM (nvl(cpu_time_delta,0)) cput,• Tie in the SQL_ID to SUM (nvl(elapsed_time_delta,0)) elap, DBA_HIST_SQLTEXT for SQL SUM (nvl(rows_processed_delta,0)) rowsp, statement. SUM (nvl(sorts_delta,0)) sorts,• Tie in the SQL_ID to SUM (nvl(disk_reads_delta,0)) diskread DBA_HIST_ACTIVE_SESS_HISTO FROM dba_hist_sqlstat RY for User id and Program name. WHERE dbid = V_DBID AND instance_number = V_INST• May also use OEM to find more AND snap_id between information on the SQL_ID. V_SNAP_B and V_SNAP_E GROUP BY module, sql_id --ORDER BY bget/nvl(nullif(exec,0),1) desc) ORDER BY bget desc) WHERE ROWNUM < 21
Finding Concurrent Program• For all EBS standard programs, “MODULE” in AWR (v$session) is the Concurrent Program Name.• Details on the program and request run times can be obtained from FND_CONCURRENT_PROGRAMS and FND_CONCURRENT_REQUESTS using the MODULE.
Identifying Job SlownessIssue Using ASH• User complains concurrent job “Item Cost Import” ran longer and provided request id.• FND_CONCURRENT_REQUESTS has details including start and end time.• Find the concurrent program name of the request, and search ASH for module during the timeframe.
The ASH Report @$ORACLE_HOME/rdbms/admin/ashrpt.sql
Identifying Session Details Using ASH• ASH report also shows blocking sessions during the window selected. Filtering the report for a specific session gives more details.
AWR/ASH Not Substitute for 10046 Trace • AWR cannot replace Session trace, but is a quick analysis tool for performance issues or for trending. • Favorite trace interpretation utility is “Trace Analyzer” – which is “tkprof on steroids” • Trace Analyzer reads a raw SQL Trace generated by standard SQL Trace or by EVENT 10046 (Level 4, 8 or 12), and generates a detailed HTML report with performance details, including bind values. • Trace Analyzer is available from MetaLink, see note # 224270.1 for download and install instructions.
My Most Used SQL Query SELECT DISTINCT Substr (fcpv.concurrent_program_name || - || fcpv.user_concurrent_program_name, 1, 60) program, fu.user_name, fu.description who, fcr.request_id, fcr.parent_request_id, fcr.requested_start_date, fcr.actual_start_date, fcr.actual_completion_date, Numtodsinterval(fcr.actual_completion_date - fcr.actual_start_date, day) duration, fcr.argument_text, phase_code, status_code, Decode (fcr.phase_code, P, Pending, R, Running, C, Completed, phase_code) phase, Decode (fcr.status_code, A, Waiting, B, Resuming, C, Normal‘, D, Cancelled, E, Error, G, Warning, H, On Hold, I, Normal, M, No Manager, P, Scheduled, Q, Standby, R, Normal, S, Suspended, T, Terminating, U, Disabled, W, Paused, X, Terminated, Z, Waiting) status, fcr.completion_text FROM apps.fnd_concurrent_requests fcr, apps.fnd_concurrent_programs_tl fcpt, apps.fnd_concurrent_programs_vl fcpv, apps.fnd_user fu WHERE fcr.concurrent_program_id = fcpt.concurrent_program_id AND ( fcr.concurrent_program_id = fcpv.concurrent_program_id AND fcr.program_application_id = fcpv.application_id ) AND fcr.requested_by = fu.user_id -- AND fcr.actual_start_date >= SYSDATE - 1 -- and to_date(04/02/2012 01:05:00,MM/DD/YYYY HH24:MI:SS) between fcr.actual_start_date and fcr.actual_completion_date AND fcpt.USER_CONCURRENT_PROGRAM_NAME LIKE Item Cost I% -- AND fcr.request_id =38664594 -- AND fcpv.Concurrent_Program_Name like INCOIN% -- and argument_text like %MDS_MRP% -- and TRUNC((fcr.ACTUAL_COMPLETION_DATE - fcr.ACTUAL_START_DATE)*24) > 2/24 -- and fcr.phase_code = P -- and fcr.status_code in (E) -- and fcr.requested_by != 0 -- and fcr.actual_start_date is null -- and fcr.requested_start_date < sysdate ORDER BY fcr.ACTUAL_START_DATE desc
Variations of Favorite Query – RunningRequests with SQL and Session Lock Info SELECT fcr.Request_Id Request_id, fcr.parent_request_id parent_req, fu.User_name, substr(fu.description, 1,30) user_desc, s.sid || , || s.serial# SIDSERIAL, fcpv.Concurrent_Program_Name|| - || Fcpv.User_Concurrent_Program_Name Program, TO_CHAR (fcr.actual_start_date, mm/dd hh24:mi) start_time, fcr.requested_start_date, numtodsinterval(sysdate-fcr.actual_start_date,day) duration, fcr.argument_text, p.spid, fpro.os_process_id, phase_code, status_code, qt.user_concurrent_queue_name, s.lockwait, s.sql_id, s.module FROM apps.Fnd_Concurrent_Queues Fcq, apps.fnd_concurrent_queues_tl qt, apps.Fnd_Concurrent_Requests Fcr, apps.Fnd_Concurrent_Programs Fcp, apps.Fnd_User Fu, apps.Fnd_Concurrent_Processes Fpro, v$session s, v$process p, apps.Fnd_Concurrent_Programs_Vl Fcpv WHERE status_Code = R AND s.paddr = p.addr AND fcr.requested_by = user_id AND fcq.application_id = qt.application_id AND fcq.concurrent_queue_id = qt.concurrent_queue_id AND USERENV (lang) = qt.language AND fcr.os_process_id = s.process AND fcr.Controlling_Manager = Concurrent_Process_Id AND (fcq.concurrent_queue_id = fpro.concurrent_queue_id AND fcq.application_id = fpro.queue_application_id) AND (fcr.concurrent_program_id = fcp.concurrent_program_id AND fcr.program_application_id = fcp.application_id) AND (fcr.concurrent_program_id = fcpv.concurrent_program_id AND fcr.program_application_id = fcpv.application_id) ORDER BY fcr.actual_start_date;
Variations of Favorite Query – RunawayConcurrent DB Sessions SELECT fcr.request_id, fu.user_name, p.spid, s.sid ||, ‘ || s.serial# sidserial, s.module, Substr(fcpv.concurrent_program_name || - || fcpv.user_concurrent_program_name, 1, 46) program, To_char(fcr.actual_start_date, mm/dd hh24:mi:ss) CM_Job_start_time, To_char(s.logon_time, mm/dd hh24:mi:ss) Session_login_time, phase_code, status_code, To_char(Trunc(SYSDATE) + ( SYSDATE - fcr.actual_start_date ), hh24:mi:ss) duration FROM apps.fnd_concurrent_queues fcq, apps.fnd_concurrent_queues_tl qt, apps.fnd_concurrent_requests fcr, apps.fnd_concurrent_programs fcp, apps.fnd_user fu, apps.fnd_concurrent_processes fpro, v$session s, v$process p, apps.fnd_concurrent_programs_vl fcpv WHERE phase_code = C AND status_code = X AND s.paddr = p.addr AND fcr.requested_by = user_id AND fcq.application_id = qt.application_id AND fcq.concurrent_queue_id = qt.concurrent_queue_id AND Userenv(lang) = qt.language AND fcr.os_process_id = s.process AND fcr.controlling_manager = concurrent_process_id AND ( fcq.concurrent_queue_id = fpro.concurrent_queue_id AND fcq.application_id = fpro.queue_application_id ) AND ( fcr.concurrent_program_id = fcp.concurrent_program_id AND fcr.program_application_id = fcp.application_id ) AND ( fcr.concurrent_program_id = fcpv.concurrent_program_id AND fcr.program_application_id = fcpv.application_id ) and fcpv.concurrent_program_name = s.module ORDER BY fcr.actual_start_date;
Performance Issues Identified… • Few performance issues identified and fixed using AWR/ASH method… Update Standard Costs Calculate Plan Performance Indicators MRP Concurrent Debug ATP Custom Index / Table INITRANS
Perf Issue: Update Standard Costs• Large LIO on BOM.CST_STD_COST_ADJ_VALUES table noticed.• Coming from CMCICU• SQL happened to be typical optimizer statistics collection• Every time program runs, 10% statistics on table was run – multiple users run the program multiple times a day, on a table with over 80 million rows!• Fixed issue by setting profile “CST: Cost update- Gather Statistics” to “N”.• Weekly GATHER and daily GATHER_AUTO statistics scheduled in DB, hence this stat collection seemed unnecessary.• Look for similar profiles like “AR: AutoInvoice Gather Statistics”.
SELECTsubstr(pro1.user_profile_option_name,1,35) Profile,decode(pov.level_id,10001,Site,10002,Application,10003,Resp,10004,User) Option_Level,decode(pov.level_id,10001,Site,10002,appl.application_short_name,10003,resp.responsibility_name,10004,u.user_name) Level_Value,nvl(pov.profile_option_value,Is Null) Profile_option_ValueFROMapps.fnd_profile_option_values pov,apps.fnd_responsibility_tl resp,apps.fnd_application appl,apps.fnd_user u,apps.fnd_profile_options pro,apps.fnd_profile_options_tl pro1WHERElower(pro1.user_profile_option_name) like (%sla%diag%) and pro.profile_option_name = pro1.profile_option_nameand pro.profile_option_id = pov.profile_option_id--and lower(pov.profile_option_value) like %desdb2%--and resp.responsibility_name like %General%Ledger%and pov.level_value = resp.responsibility_id (+)and pov.level_value = appl.application_id (+)and pov.level_value = u.user_id (+)order by 1,2;
Perf Issue: Calculate PlanPerformance Indicators• Large LIO on MRP.MRP_BIS_INV_DETAIL table.• Several deletes and inserts on the table multiple times a day. Table had multiple million rows.• Coming from module MRPCBIS• Per metalink Note 783088.1 this job is no longer needed in Master Scheduling / MRP.• Turn off calculation using profile “MRP: Calculate Plan Performance” to “No”.• Truncate tables MRP_BIS_INV_DETAIL and MRP_BIS_RES_SUMMARY.
Perf Issue: Materials RequirementPlanning• The purpose of material planning is to balance material supply to demand by simulating the future – very critical process in some of our environments.• Performance improved by setting the following profile values… • MRP:Planning Manager Batch Size = 1000 • MRP:Planning Manager Max Workers = 10 • MRP:Purge Batch Size = 600,000 • MRP:Snapshot Workers = 10• MRP specialized manager should have at least “(2 x <Snapshot Workers>) + 6” processes.
Perf Issue: Debug and Trace• There were many profiles at site level set to “debug” mode.• Revealed by large number of I/O against FND_CONCURRENT_DEBUG_INFO and FND_LOG_MESSAGES• Turn off tracing and debugging in production unless troubleshooting an issue• Few debugs that were enabled: • Account Generator:Run in Debug Mode • FND: Diagnostics • FND: Debug Log Enabled • INV:Debug Level • WSH: Debug Level• Concurrent programs running with trace enabled select a.concurrent_program_name ,a.enable_trace from FND_concurrent_programs a where a.enable_trace=Y
Perf Issue: Available to Promise• ATP jobs are part of supply chain planning.• Refresh Collection Snapshots jobs run forever• Large number of rows spotted in MLOG$ tables• Snapshot refreshes were not deleting rows from MLOG$ tables even after a full/incremental refresh• Identified dependent materialized views for MLOG$ with large number of rows• Many snapshots (mv) are not used/refreshed for a long time.• Manually remove them from registered snapshots• Also, truncating the MLOG$ tables and locking statistics on them helped
Perf Issue: Identifying andClearing Unused MV Reference• Identify materialized view last refresh time SELECT r.NAME snapname, snapid, l.log_table, snaptime FROM sys.slog$ s, dba_registered_snapshots r, (SELECT log_owner, master, log_table from dba_mview_logs where log_table in (&mlogtables )) L WHERE s.snapid=r.snapshot_id(+) AND s.mowner = l.log_owner AND s.MASTER = l.master order by snaptime desc;• If MV no longer used, purge and unregister. exec DBMS_SNAPSHOT.PURGE_SNAPSHOT_FROM_LOG (<snapid>);• Now MV refreshes delete rows from MLOG$ tables.• MV will be registered again when FULL refresh is done.
Perf Issue: INITRANS• AWR report showed several wait events on “Read by another session” or “Buffer busy waits”• Almost all of the tables/indexes involved in this wait were custom tables/indexes.• By default most EBS tables/indexes have INITRANS value of 10 and 11. These custom tables/indexes were created with default value of 2.• Rebuild the indexes and reorganize tables with appropriate INITTRANS• Note: DB is not using ASSM. The INITRANS setting controls Initial Transaction Slots (ITLs). A transaction slot is required for any session that needs to modify a block in an object.
Maintenance: Purge andCleanup Jobs• EBS 11i and R12 provide several concurrent jobs for application and database maintenance to keep it running healthy.• Commonly scheduled maintenance jobs • Gather Schema Statistics - If you are on 11gR2, you may estimate percent 0%, thus Oracle will use automatic sampling. • Purge Concurrent Request and/or Manager Data• Consider Scheduling these maintenance jobs • Purge Debug Log and System Alerts • Purge Signon Audit data • Purge Obsolete Workflow Runtime Data • Purge Obsolete Generic File Manager Data • JTF Item InterMedia Index Sync Operation• Consider multiple “Purge Concurrent Request” jobs • In addition to “Entity=All” with “Mode=Age”, schedule additional jobs with ModeValue=1 to remove request logs for programs that run often, especially several times a day.• Collect 100% stats on FND_CONCURRENT_REQUESTS Daily
Back to Basics – QuickRefresher on PCT USED/FREE• Since the purge and cleanup jobs delete rows from the tables, and thousands of rows are added daily to table, reorganizing the tables reduce the blocks used as well as improve performance.• As a practice, we rebuild indexes on these tables quarterly and reorganize these tables annually.• Many _INTERFACE tables also candidates for reorg.
Indexes [Tables] for Reorg Consideration• Tables where purge jobs act • FND_CONCURRENT_REQUESTS • CTXSYS tables • FND_LOGINS • DR$WAITING • FND_LOGIN_RESPONSIBILITIES • DR$PENDING • WF_ITEM_ATTRIBUTE_VALUES • MLOG$ tables • WF_ITEM_ACTIVITY_STATUSES • If the size is larger • FND_STATS_HIST • Custom tables • FND_LOG_MESSAGES • Temporary data• Tables where data is deleted and • Staging data inserted often • MRP, QP Schema Indexes • _INTERFACE tables The reorg recommendation may be against Oracle’s best practice and some experts do not believe reorg adds value. Test in your environment …
Multiple Standard ConcurrentManagers• Multiple Standard Managers to divide the jobs – Request Processing Managers• At least 3 per Concurrent Manager – Set processes appropriate to load, but cache size at least twice processes. • Fast : Requests that complete under a minute – sleep value 10 secs • Long: Requests that take longer than 10 minutes – sleep value 60 secs. • Default: Default queue – sleep value 30 secs• Conflict Resolution Manager Sleep time : change to low value from default 60 seconds.
Upgrade Database to 11gR2• If still using 10g or 11gR1 database with 126.96.36.199 or 12.x EBS, upgrade database to 11gR2 latest patch set.• Excellent performance improvement in many areas after upgrade. Sufferers may be Custom programs and reports!• Remember to run dictionary stats, fixed stats in addition to Schema Stats after the upgrade.• Review Oracle E-Business Suite Recommended Performance Patches [ID 244040.1]• Few Metalink Notes and DB Patches: Interoperability Notes Oracle EBS 11i with Oracle Database 11gR2 (11.2.0) [ID 881505.1] Interoperability Notes EBS 12.0 and 12.1 with Database 11gR2 [ID 1058763.1] • "Database Patch Set Update : 188.8.131.52.x – Latest PSU • Apply all recommended interoperability patches – on DB and EBS • Following patches may be part of latest PSU, but we applied to fix issues… • Patch 14571027: NATIVE COMPILED FILES FOR PL/SQL ON 11G ARE SIGNIFICANTLY LARGER THAN 10G • Patch 14013094: PARTITION ORDER IN INDEX DEFINITION IS DIFFERENT THAN TABLE PARTITION • Patch 13059165: UTLRP DOES NOT REPORT INVALID OBJECTS • Patch 12834800: ORA-7445 [qkxrPXformUnm] with positional ORDER BY or GROUP BY with function based index