--On April 7, 2006 8:58:57 PM +0200 Sascha Bieler <[EMAIL PROTECTED]> wrote:
Hi there, I am running cyrus-imapd-2.1.12 on a Gentoo Linux with kernel 2.6.15. Got a Pentium 4 Xeon 2,8 GHz and 2 GB Ram. The cyruspartition is ext3 on a SCSI RAID 5. hdparm -tT /dev/sda says: /dev/sda: Timing cached reads: 2316 MB in 2.00 seconds = 1158.00 MB/sec Timing buffered disk reads: 80 MB in 3.01 seconds = 26.58 MB/sec Everythings working just fine, but when I want to delete an email it's sooooo slowly... Has anyone a hint for me?
Depends a LOT on your I/O load. 27MB/sec is pretty slow, and that's reads, RAID5 writes are often as slow as half, depending on your hardware, plus that's before the filesystem is in the way. Large directories slow ext3 down quite a bit.
Expunge operations on our large mail backends are often pretty slow too, but aren't too bad, though we're using a lot bigger hardware and servers.
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