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).