On Mon, Mar 09, 2009 at 05:04:16PM +0100, Wojciech Puchar wrote: >> The server is overload, the disk is 100% busy with 250 write operations >> per second and a throuput of 6MB/s. >> My first idea is because of mass random access/write on the disk. But I also >> see >> the server can make 20k page fault per second.
> what page fault? most page faults in FreeBSD doesn't mean disk access, > just no mapping present in page tables, which gets mapped after the > fault. > Only if page is actually not present in memory it is fetched from disk. > top shows in what state is a process. > if it's biord or biorw - it's doing disk/file I/O, not swapping. The box don't swap. I just ask if page fault interrupt postgresql process and fragment/de-optimize disk write. -- Nicolas Haller _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
