On 2011-10-07 15:51, Bernhard Schmidt wrote:
Am 07.10.2011 12:12, schrieb Reindl Harald:
Am 07.10.2011 10:41, schrieb Bernhard Schmidt:
Basically the only problem with postfix here is that I cannot have
queue_minfree> 2GB to be on the safe side, so I don't know how to avoid
this problem
have you considered using ext4 instead of XFS?
Yes, I'm testing that now. XFS is default in-house and I think even
distribution-wide default for SLES, but it might not be the ideal FS
here. XFS list also said it might not be optimal for this case.
Deleting inodes is very, VERY expensive on XFS.
Since mail is always written to, read from, and deleted off the queue
spool, all operations need to be equally fast for a mail spool to
operate efficiently.
Test out different filesystems with and without internal or external
journals; an external journal for ext3 or JFS may or may not improve
throughput.
With the journal on a different filesystem, reading the journal and
writing the queue would be faster than if both were on the same disk,
but this will always be slower than not using a journal in the first place.
--
J.
