"Joshua D. Drake" <[EMAIL PROTECTED]> writes: > Tom Lane <[EMAIL PROTECTED]> wrote: >> IIRC we were speculating that data was being written >> in a pattern that required a lot of seeking thus ruining throughput, >> but we didn't have any hard evidence of that. Did you do the >> strace'ing I suggested?
> Yes, I asked if you wanted counts or the whole output. You didn't > answer :). I provided the counts. Uh, sorry. Counts are useless here, we need to see the sequence of write locations to find out if there's a lot of nonconsecutive writes happening. BTW, the strace had better run across the whole PG process tree --- it's quite possible that there's some interaction between the bgwriter and the backend doing COPY, for instance. regards, tom lane ---------------------------(end of broadcast)--------------------------- TIP 1: if posting/reading through Usenet, please send an appropriate subscribe-nomail command to [EMAIL PROTECTED] so that your message can get through to the mailing list cleanly