streams aq enqueue blocked on low memory

#STREAMS AQ ENQUEUE BLOCKED ON LOW MEMORY FULL#
#STREAMS AQ ENQUEUE BLOCKED ON LOW MEMORY FREE#

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#STREAMS AQ ENQUEUE BLOCKED ON LOW MEMORY FULL#

To view full details, sign in with your My Oracle Support account.ĭon't have a My Oracle Support account? Click to get started! (logtime parameter is available on 12.1 and onward)Įxporting an empty partitioned table takes 0-3 seconds to export each partition, which normally takes less than a second to export. Information in this document applies to any platform.ĭatapump export and import (expdp and impdp) may encounter sudden severe slowdowns due to DW and DM processes frequently waiting on 'StreamsAQ: enqueue blocked on low memory'.įollowing is an example symptom from an expdp logtime=all command. Decemby Shripal In this article, we are going to discuss the oracle wait event Streams AQ: enqueue blocked on low memory due to this wait event we are facing a performance issue in the export backup, today my export backup was in a hung state and it takes a very long time. Either leave this parameter unset or set this. After digging, Oracle MOS portal helped me in this case.

When set explicitly to a value of 0, it can negatively impact the speed of Advanced Queue operations, which in turn can negatively affect Data Pump operations since Data Pump uses Advanced Queueing. Almost 94 of time was spent on the Streams AQ: enqueue blocked on low memory wait event. Oracle Database - Standard Edition - Version 11.2.0.4 and later You can use parallel to speedup the datapump jobs. If you check the session, you’ll find it frequently waiting on Streams AQ: enqueue blocked on low memory, this is due to the BUG 27634991. Oracle Database - Enterprise Edition - Version 11.2.0.4 and later Sometimes you might find your export job, out of nowhere, starts taking a lot to finish, like if it normally takes 2 hours to end after 5 hours is still running and it’s not even at half the job done. In database version 11.2.0.4, Oracle has implemented a new algorithm for modifying components of the SGA memory, which has issue while changing the size of the stream pool size.Datapump Expdp Or Impdp Slowdown Due To Frequent Waits On ”Streams AQ: Enqueue Blocked On Low Memory' Of course it was something to related to performance issue I was observing. To avoid STREAMS AQ: ENQUEUE BLOCKED ON LOW MEMORY error, you must set the STREAMSPOOLSIZE value returned by the result set of the following query. Check the stream pool size parameter SQL> show parameter streams NAME TYPE VALUE. The wait 'Streams AQ: enqueue blocked on low memory' indicates exhaustion of the streams pool. In database version 11.2.0.4, Oracle has implemented a new algorithm for modifying components of the SGA memory, which has issue while changing the size of the stream pool size. It was Streams AQ: enqueue blocked on low memory. Streams AQ: enqueue blocked on low memory processing issue in Oracle 1. Almost 94 of time was spent on the Streams AQ: enqueue blocked on low memory wait event. Almost 94% of time was spent on the “Streams AQ: enqueue blocked on low memory” wait event. Then I thought of observing wait event for EXPDP master & slave processes. The problem also reproduces when running an. The slow Import Data Pump performance problem might also reproduce in other Oracle11g Releases (like: 11.2.0.3) or Oracle12c Release 12.1.0.1. The import with DataPump of tables into an Oracle11g Release 11.2.0.4 database takes almost 45 minutes, while the same import into Oracle10g Release 10.2.0.4 only take 2 minutes.

Configuring Network Connectivity and Database Links. Setting Initialization Parameters Relevant to Streams. This chapter contains these topics: Configuring a Streams Administrator. If the still issue still exists then it must be a bug 24560906. SQL> ALTER SYSTEM SET streamspoolsize 150m SCOPEboth Restart the Database and then run the export backup. This chapter provides instructions for preparing a database or a distributed database environment to use Streams. The key information I got was this: If the size of the streamspool is being modified, then this can result in excessive waits for Streams AQ: enqueue blocked. We are going to change the memory for the streams pool using the below query.

#STREAMS AQ ENQUEUE BLOCKED ON LOW MEMORY FREE#

How can I get the current SGA memory distribution on Oracle 10G? Something like this: AME SIZEMB RES - Maximum SGA Size 396 No Shared Pool Size 320 Yes Startup overhead in Shared Pool 32 No Streams Pool Size 32 Yes Java Pool Size 24 Yes Buffer Cache Size 16 Yes Granule Size 4 No Redo Buffers 2,79 No Fixed SGA Size 1,21 No Free SGA Memory Available 0 Large Pool Size 0 Yes.

Streams aq enqueue blocked on low memory