![]() ![]() 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. Either leave this parameter unset or set this parameter to a value that is greater than 0. 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. You can use parallel to speed up the datapump jobs. Datapump Expdp Or Impdp Slowdown Due To Frequent Waits On Streams AQ: Enqueue Blocked On Low Memory' (Doc ID 2386566.1) Two important information: Select shrinkphaseknlasg from XKNLASG Will return 1 if the stream pool is shrinking and return 0 if such action is finished. 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. 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') In memory undo latch totalwaits Queueing: Streams AQ: enqueue blocked on low memory timewaitedmicro Queueing: Streams AQ: enqueue blocked on low. 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: Datapump - Export trs lent - Streams AQ : enqueue blocked on low memory. 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. Derrire cette petite phrase se cache peut tre une opportunit intressante pour. 192.168.56.There are some Data Pump Parameters that Significantly affect the export and import Performance. DatapumpexpdpimpdpDWDM 'StreamsAQ: enqueue blocked on low memory'. Sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw) None on /proc/sys/fs/binfmt_misc type binfmt_misc (rw) dev/sdc1 on /oracle/oradata type ext3 (rw) EXPDP And IMPDP Slow Performance In 11gR2 and 12cR1 And Waits On Streams AQ: Enqueue Blocked On Low Memory (ID 1596645. OUI-67301: The following patches have conflicts. dev/mapper/VolGroup00-LogVol00 on / type ext3 (rw)ĭevpts on /dev/pts type devpts (rw,gid=5,mode=620) 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. Mount.cifs kernel mount options: /]# mount 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. ]# mount -t cifs -v -o guest,ro //192.168.56.1/Tools /tmp/test 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.
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