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Poor Performance Writing Blobs (Doc ID 393780.1)

Last updated on DECEMBER 03, 2019

Applies to:

Oracle Database - Enterprise Edition - Version 10.2.0.1 to 10.2.0.5 [Release 10.2]
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
Oracle Solaris on SPARC (64-bit)
Oracle Solaris on SPARC (32-bit)
Sun Solaris SPARC (64-bit)Sun Solaris SPARC (32-bit)

Symptoms

A job that is writting BLOBs is taking along time to complete and consumes a lot of CPU.

The 'pstack' output of the spinning process shows :

__fdsync ksfdsyncdata kcflsync kcblsy kcblcn kcblrr
kcbldrcls kdlpdba ktsplbfmb ktsplbrecl ktspgsp_cbk1 kdlgsp
kdlsfb kdl_write1 kokliccb koklcre kokleva evaopn2
insolev insbrp insrow insdrv inscovexe insExecStmtExecIniEngine
insexe opiexe kpoal8 opiodr ttcpip opitsk
opiino opiodr opidrv sou2o opimai_real main
_start

Cause

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In this Document
Symptoms
Cause
Solution


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