Where a.indx = b.indx and a.indx = c.indx and lower(a.ksppinm) in ('_streams_pool_size','streams_pool_size') Īpós a alteração, o processo de import voltou ao normal. Which was to increase the parameter STREAMS_POOL_SIZE to the value returned by the query: select 'ALTER SYSTEM SET STREAMS_POOL_SIZE='||(max(to_number(trim(c.ksppstvl)))+67108864)||' SCOPE=SPFILE 'įrom sys.x$ksppi a, sys.x$ksppcv b, sys.x$ksppsv c Que foi aumentar o valor do parâmetro STREAMS_POOL_SIZE para o valor da query: OUI-67301: The following patches have conflicts.
#Streams aq enqueue blocked on low memory Patch
Bug 17365043 : “STREAMS AQ: ENQUEUE BLOCKED ON LOW MEMORY” WHEN REDUCING STREAMS_POOL_SIZE 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.What DataPump And Oracle RDBMS Parameters And Features Can Significantly Affect DataPump Performance ? (Doc ID 1611373.1).
#Streams aq enqueue blocked on low memory crack
With theses three documents below I could crack this issue: blocked due to flow control - Streams AQ: enqueue blocked on low memory. Bug 27634991 - EXPDP FREQUENTLY WAITS ON STREAMS AQ: ENQUEUE BLOCKED ON LOW MEMORY - Unpublished Bug 26736110 - DATAPUMP METADATA EXPORT IS SLOW FOR. Os três notes abaixo trouxeram a solução: PMgrp0 grant - gc assume - gc block recovery request - gc buffer. Verificando o Grid Control ficou claro que a sessão de impdp estava “em espera” pelo evento Oracle StreamsAQ: enqueue blocked on low memory.Ĭhecking Grid Control it was clear that impdp process was in queuing state at Oracle event StreamsAQ: enqueue blocked on low memory This week my impdp process took longer then expected.
Ótimo ! Mais um problema para resolver 🙂 In a RAC environment, it can improve the speed of Data Pump API-based operations and avoid some Parallel DML bugs at the same time.Essa semana o processo de importação de dados demorou muito mais do que o normal. Cause: streamspoolsize is autotuned with. 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. Streams AQ: enqueue blocked on low memory during data pump export.
Either leave this parameter unset or set this parameter to a value that is greater than 0. 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. EXPDP And IMPDP Slow Performance In 11gR2 and 12cR1 And Waits On. 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. 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. Streams AQ: enqueue blocked on low memoryexpdp. You can use parallel to speed up the datapump jobs. 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. I would recommend excluding the statistics during export because data pump jobs can hang, sometimes indefinitely when concurrent statistics generation for the same table is being performed by both the Data Pump engine and by any other users. In a RAC environment, it can improve the speed of Data Pump API-based operations. 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. SQL> ALTER SYSTEM SET STREAMS_POOL_SIZE=100M SCOPE=both Select 'ALTER SYSTEM SET STREAMS_POOL_SIZE='||(max(to_number(trim(c.ksppstvl)))+67108864)||' SCOPE=SPFILE ' from sys.x$ksppi a, sys.x$ksppcv b, sys.x$ksppsv c where a.indx = b.indx and a.indx = c.indx and lower(a.ksppinm) in ('_streams_pool_size','streams_pool_size') To avoid “STREAMS AQ: ENQUEUE BLOCKED ON LOW MEMORY” error, you must set the STREAMS_POOL_SIZE value returned by the result set of the following query. Parameters Affecting Datapump Performance: To make expdp and impdp backup faster, you must read this article and set the below parameters based on your requirement and the database configuration. There are some Data Pump Parameters that Significantly affect the export and import Performance.
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