Yeah, I got it Mark. Unfortunately my current management decided to suspend that investigation for a while, so I can't get any tests done or anything like that. However we found out that another server we have shows similar issues. The same card, slightly different motherboard and completely different disks. The basic issue is around concurrent reads and writes. The card is ok-ish when one process hammers the disks, but as soon as it is multiple ones - it just blows (and I use it as a technical term ;) ). Still, with only one process reading/writing - the raid card sucks big time performance wise. -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
