![]() 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. The problem also reproduces when running an Export Data Pump job from such a release database. 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. DatapumpexpdpimpdpDWDM 'StreamsAQ: enqueue blocked on low memory'. 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. 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 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. 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. 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. Streams AQ: enqueue blocked on low memory. Cause: streamspoolsize is autotuned with. ![]() Information in this document applies to any platform. Streams AQ: enqueue blocked on low memory during data pump export. Oracle Database - Standard Edition - Version 11.2.0.1 to 12.1.0.2 Oracle Database Cloud Service - Version N/A and later 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. Oracle Database Cloud Exadata Service - Version N/A and later Datapump - Export trs lent - Streams AQ : enqueue blocked on low memory. Oracle Database Backup Service - Version N/A and later EXPDP And IMPDP Slow Performance In 11gR2 and 12cR1 And Waits On Streams AQ: Enqueue Blocked On Low Memory (ID 1596645. Derrire cette petite phrase se cache peut tre une opportunit intressante pour. Oracle Database Exadata Express Cloud Service - Version N/A and later 38 enqueue Streams AQ: enqueue blocked on low memory SQL> select component,currentsize/1024/1024,lastopertype,lastopertime from vsgadynamiccomponents Here we can see that streams pool got shrink-ed due to which it was in hung state. For more information about Oracle (NYSE:ORCL), visit And IMPDP Slow Performance In 11gR2 and 12cR1 And Waits On Streams AQ: Enqueue Blocked On Low Memory 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. #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! Of course it was something to related to performance issue I was observing. In memory undo latch totalwaits Queueing: Streams AQ: enqueue blocked on low memory timewaitedmicro Queueing: Streams AQ: enqueue blocked on low. It was Streams AQ: enqueue blocked on low memory. (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. Then I thought of observing wait event for EXPDP master
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