Re: [zfs-discuss] ZFS Prefetch Tuning

2010-12-09 Thread Enda O'Connor
Hi I'd certainly look at the sql being run, examine the explain plan and in particular SQL_TRACE, TIMED_STATISTICS, and TKPROF, these will really highlight issues. see following for autotrace which can generate explain plan etc. http://download.oracle.com/docs/cd/B10500_01/server.920/a96533/a

Re: [zfs-discuss] ZFS Prefetch Tuning

2010-12-09 Thread Jabbar
I've also found this http://developers.sun.com/solaris/docs/wp-oraclezfsconfig-0510_ds_ac2.pdf On 9 December 2010 20:22, Jabbar wrote: > Hello Tony, > > If the hardware hasn't changed I'd look at the workload on the database > server. If the customer is taking regular statspack snapshots they mi

Re: [zfs-discuss] ZFS Prefetch Tuning

2010-12-09 Thread Jabbar
Hello Tony, If the hardware hasn't changed I'd look at the workload on the database server. If the customer is taking regular statspack snapshots they might be able to see whats causing the extra activity. They can use AWR or the diagnostic pack, if they are licensed, to see the offending SQL or P