Problem solved!
"sysctl -w net.inet.tcp.delayed_ack=0" solves problem for IMAP and also
Postfix, so mainly fsync() was no issue. I had no time to searh why this so
drastically affects performance, but maybe somebody will know the answer.
-Sākotnējā ziņa-
No: "Juris Orlovs" <[EMAIL PROT
--On February 9, 2006 10:46:29 AM + David Carter <[EMAIL PROTECTED]>
wrote:
Cyrus and Postfix both make very heavy use of fsync() to flush data to
disk before they confirm actions back to the sending system. RAID
controllers or disk boxes with battery backed writeback cache help lots.
On Thu, 9 Feb 2006, Juris Orlovs wrote:
Before that I was setting up Cyrus IMAP mail servers on Linux and there
was no such problems. Maybe it's OS issue? I also have set up such
system on Celeron 800MHz, 256MB RAM and 80GB SEAGATE (FreeBSD 4.11), the
results are aproximately the same. For SMT
On Thu, 09 Feb 2006, Juris Orlovs wrote:
> For SMTP i'm using Postfix, and it also shows bad results on data
> transfer. Seems that the biggest problems I have with mail software,
> because other services like FTP doesn't show such bad results.
I am by no means a FreeBSD expert, but I would check
