On Thu, 3 Dec 2009 09:05:21 -0600, Timo Sirainen tss@iki.fi wrote:
On Dec 3, 2009, at 5:50 AM, Aravind Divakaran wrote:
strace -tt would have actually been also more helpful, so it would have included timestamps. Are you using NFS or something similar for your filesystem in /home? The strace does show that Dovecot seems to be reading from a file that it just wrote to, so there's something non-optimal but it necessarily shouldn't be that slow.
You can find my strace with timestamp on the below link.
That's only 400 milliseconds. I thought the delivers would be running for at least a few seconds? Can you show such a strace -tt?
My /home partition using san storage with ocfs filesystem.
Anyway I suppose this could be the reason, if the problem is the reads..
You could also try if it helps when you increase this in src/deliver/deliver.c:
#define MAIL_MAX_MEMORY_BUFFER (1024*128)
to
#define MAIL_MAX_MEMORY_BUFFER (1024*1024*100)
i.e. 100 MB (or whatever is large enough for most mails).
I had made the changes for MAIL_MAX_MEMORY_BUFFER and installed the new dovecot.
I was monitoring my mail server for past few days. Today i experienced the same problem
My log file shows
Dec 14 12:38:19 server01 dovecot: deliver(user1@example.com): Created dotlock file's timestamp is different than current time (1260774499 vs 1260774377): /home/vmail/example.com/user1/dovecot-uidlist Dec 14 12:38:19 server01 dovecot: deliver(user2@example.com): Created dotlock file's timestamp is different than current time (1260774499 vs 1260774377): /home/vmail/example.com/user2/dovecot-uidlist
The above erros will show when i change the maxproc from 4 to default in postfix. At this time dovecot deliver process is using lot of cpu.
Dec 14 12:46:04 server01 postfix/pipe[1870]: 57489E913: to=user1@example.com, orig_to=user2@example.com, relay=dovecot, delay=1703, delays=1369/328/0/5.9, dsn=5.7.0, status=bounced (permission denied. Command output: Not enough disk space )
As my hardisk has enough space, why dovecot is giving this error?
-Aravind