Performance - EBS (MOSC)

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FND_LOBS and other BLOB, CLOB, LOB types on ZFS filesystems

edited Oct 26, 2016 12:46AM in Performance - EBS (MOSC) 6 commentsAnswered ✓

We have just had our E-Business 11.2.0.4 database migrated from veritas to zfs. We have been seeing terrible performance on FND_LOBS and it is most likely due to the FND_LOBS table or APPS_TS_MEDIA tablespace being on a filesystem with an 8k recordsize. Oracle recommends all LOBS and BLOBS be on a filesystem with a recordsize of 128k logbias=throughput and primarycache=all.

I need assistance in improving performance and I am confident this will help based on very log delays on accessing APPLSYS.FND_LOBS, and even some timeouts. Once the new filesystem with the correct recordsize, logbias and primarycache are created, should we move the entire APPS_TS_MEDIA tablespace there, or only specific objects? Any assistance you can provide will be so appreciated.

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