When using the Purge Oldest Records rule, the oldest records are deleted from the geodatabase according to their time stamps. The Purge Oldest Records rule is useful when you want to display some history for your tracked objects. Tracking Analyst should not be left to run unattended or for extended periods of time with auto purging disabled due to the increased risk of running out of system memory and causing machine instability. By disabling automatic purging, you can observe how fast your data grows and judge how large you need to set the purge threshold. Another situation when you might want to disable the Auto Purge option is while you are making changes to the purge settings. This can be used successfully only if you know you have a slow data feed that is not going to consume much memory.
When auto purge is disabled, data will never be purged from memory, and the consumption of memory will continuously increase. In most situations, you want to enable the Auto Purge option. The purge threshold is the number of records that must be stored in memory before Tracking Analyst purges data. The Auto Purge option on the Tracking Service Properties dialog box controls whether or not purging occurs at all. The Purge Rule settings are located on the Tracking Service Properties dialog box. Generally, there are two purge rules to choose from: Purge Oldest Records and Purge All Except Latest.Ĭhoosing the right purge rule for your real-time tracking service is critical for maximizing functionality and performance. A purge rule is defined individually for each tracking service. The purge rule is the mechanism provided in Tracking Analyst for specifying how much data is removed from memory for a real-time tracking service and how often. To limit the amount of memory consumed, real-time data must occasionally be removed, or purged, from the system memory. Tracking Analyst stores real-time data completely in memory to maximize performance. To disable the DEFAULT_MAINTENANCE_PLAN you can use the below steps as suggested in Note 786346.1ġ.The purge rule defines how real-time data is stored in system memory.
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The following solution should only be used as a last resort because it may lead to other issues in the long run if Oracle has inadequate maintenance windows to collect new optimizer stats, find better execution plans for expensive SQL, purge AWR, etc. It may be better to move the maintenance windows to a time of day when CPU resources might be more available for such tasks to run and complete. Please review the following document first to address any known bugs: Setting Resource Manager plan DEFAULT_MAINTENANCE_PLAN via parameterīegin automatic SQL Tuning Advisor run for special tuning task "SYS_AUTO_SQL_TUNING_TASK" Setting Resource Manager plan SCHEDULER:DEFAULT_MAINTENANCE_PLAN via scheduler window From 11g onwards every weekday window has a pre-defined Resource Plan called DEFAULT_MAINTENANCE_PLAN, which will become active once the related window opens.įollowing entries can also be noted in alert log at the time of issue. This could be due to DEFAULT_MAINTENANCE_PLAN. You already have confirmed parameter RESOURCE_MANAGER_PLAN is set to null but still noticing the above wait events.Įvent Waits Time(s) Avg wait(ms) % DB time Wait Class Issuing a sqlplus / as sysdba might be hanging and/or high waits on event 'resmgr:cpu quantum' might be noticed even when resource manager is disabled. Information in this document applies to any platform. Oracle Database - Enterprise Edition - Version 11.1.0.6 and later High "Resmgr:Cpu Quantum" Wait Events In 11g Even When Resource Manager Is Disabled Resource Manager and Sql Tunning Advisory DEFAULT_MAINTENANCE_PLAN SYS PURGE_LOG_PROG STORED_PROCEDURE dbms_to_purge OWNER PROGRAM_NAME PROGRAM_TYPE PROGRAM_ACTION SQL> select owner, program_name, program_type, program_action ORA-06512: at "SYS.DBMS_SCHEDULER", line 3425Īrchived Log entry 2543 added for thread 1 sequence 2543 ID 0x4f636503 dest 1:Ĭlosing Resource Manager plan via scheduler windowĬlearing Resource Manager plan via parameter ORA-06508: PL/SQL: could not find program unit being called: "SYS.DBMS_AQADM_SYS" ORA-04063: package body "SYS.DBMS_AQADM_SYS" has errors ORA-12012: error on auto execute of job "SYS"."PURGE_LOG"
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