ASYNCH IO Disabled however still asynch IO waits Been Seen
Hello ,
asynch appears to be disabled from the DB side (FILESYSTEMIO_OPTIONS=DIRECT, ASYNCH_DISK_IO=FALSE, ASYNCH_TAPE_IO=FALSE and mount file system mount option FORCEDIRECTIO) we still see asynch IO waits in v$session for the RMAN processes. These asynch IO waits are extremely long and resulting in the RMAN backups taking 2x longer than they did with asynch IO enabled. Why is this and what can we do to fix it?
These are UFS file systems.
DB : 9.2.0.7
OS : Oracle Solaris on SPARC (64-bit)
Please advise
asynch appears to be disabled from the DB side (FILESYSTEMIO_OPTIONS=DIRECT, ASYNCH_DISK_IO=FALSE, ASYNCH_TAPE_IO=FALSE and mount file system mount option FORCEDIRECTIO) we still see asynch IO waits in v$session for the RMAN processes. These asynch IO waits are extremely long and resulting in the RMAN backups taking 2x longer than they did with asynch IO enabled. Why is this and what can we do to fix it?
These are UFS file systems.
DB : 9.2.0.7
OS : Oracle Solaris on SPARC (64-bit)
Please advise
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