![]() Either leave this parameter unset or set this. 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. When the streams pool finishes shrinking, the value should return "0", but if it keeps returning "1", you may encounter this problem. You can use parallel to speedup the datapump jobs. This value indicates that the streams pool is in the shrinking phase. Streams AQ: enqueue blocked on low memory Oracle wait event oracle oracledba oracledatabase. If you encounter similar performance problems, please check whether the following query always returns "1". In the Auto SGA environment (sga_target or memory_target is set), this problem may occur when the buffer cache load is high and the memory in the streams pool is being moved to the buffer cache. Bug 27634991 - EXPDP FREQUENTLY WAITS ON STREAMS AQ: ENQUEUE BLOCKED ON LOW MEMORY - Unpublished Bug 26736110 - DATAPUMP METADATA EXPORT IS SLOW FOR. Waiting events in the database will also prompt Streams AQ: enqueue blocked on low memoryĪnd sometimes there may be Streams AQ: enqueue blocked on low memory errors in expdp log and alert log, but note that it may not be, but it is possible. EXPDP And IMPDP Slow Performance In 11gR2 and 12cR1 And Waits On. > 1 Streams AQ: enqueue blocked on low memory 2 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. Streams AQ: enqueue blocked on low memoryexpdp. For more information about Oracle (NYSE:ORCL), visit > select inst_id,event,count(1) from gv$session where wait_class# 6 group by inst_id,event order by 1,3 Oracle offers a comprehensive and fully integrated stack of cloud applications and platform services. My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts. ![]() ![]() Datapump - Export trs lent - Streams AQ : enqueue blocked on low memory. And sometimes there may be Streams AQ: enqueue blocked on low memory errors in expdp log and alert log, but note that it may not be, but it is possible. 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. To view full details, sign in with your My Oracle Support account.ĭon't have a My Oracle Support account? Click to get started! Derrire cette petite phrase se cache peut tre une opportunit intressante pour. Streams AQ: enqueue blocked on low memory processing issue in Oracle 1. ![]() The production database was adjusted from original AMM (Automatic memory management) to ASMM (Automatic Shared Memory Management), then it takes 4.5 hours instead of 30 minutes to run logical backup. If the still issue still exists then it must be a bug 24560906. EXPDP And IMPDP Slow Performance In 11gR2 and 12cR1 And Waits On Streams AQ: Enqueue Blocked On Low Memory (ID 1596645. SQL> ALTER SYSTEM SET streamspoolsize 150m SCOPEboth Restart the Database and then run the export backup. ![]() Wait for unread message on broadcast channel Streams AQ: enqueue blocked on low memory. We are going to change the memory for the streams pool using the below query. Streams AQ: enqueue blocked on low memory OUI-67301: The following patches have conflicts. Misses in library cache during execute: 181Įlapsed times include waiting on following events:Įvent waited on Times Max. I get this warning applying Patch 21286665: EXPORT IS SLOW WAITING FOR 'STREAMS AQ: ENQUEUE BLOCKED ON LOW MEMORY' with OPatch 11.2.0.3.11 but the Patch finally didn't apply. Misses in library cache during parse: 367 ideally, the export backup was completed between one to two hours. OVERALL TOTALS FOR ALL RECURSIVE STATEMENTSĬall count cpu elapsed disk query current rowsĮxecute 37965 25.93 8216.31 5760 1913414 91738 25885 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. ![]()
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