Re: [Dovecot] Slow connections with POP3 service
Great. Thank you so much for responding. It hangs at Tying 127.0.0.1
The funny part is that one day it works fine and the next day it just hangs. And its not that the service is completely unresponsive. If 200 users try to connect, 10 get through and are able to download. However which 10 get through depends on luck!
Its been going on for the past one week and really driving me crazy. I have changed everthing including the server, but the problem persists. How do I get a clue where the problem is?
Am badly in need of help here.
Regards V S Rao.
----- Original Message ----- From: "Timo Sirainen" tss@iki.fi To: "V S Rao" viriyala@yahoo.com Cc: dovecot@dovecot.org Sent: Wednesday, April 29, 2009 11:23:37 PM GMT +05:30 Chennai, Kolkata, Mumbai, New Delhi Subject: Re: [Dovecot] Slow connections with POP3 service
On Tue, 2009-04-28 at 00:12 -0700, V S Rao wrote:
Even a telnet to localhost on port 110 is very very slow.
Which part of it exactly is slow? For example in a typical pop3 connection you have:
Trying 127.0.0.1... Connected to localhost. Escape character is '^]'. +OK Dovecot ready. user xyz +OK pass asd +OK Logged in.
Like is it hanging after "Trying", "Connected", "pass", .. ?
On Wed, 2009-04-29 at 11:17 -0700, V S Rao wrote:
Great. Thank you so much for responding. It hangs at Tying 127.0.0.1
When this happens you could see what strace -p <pid of some imap-login process> shows. Does it show that some syscall (poll/epoll) is going on (Dovecot is listening ok), or does it not print anything (Dovecot is hanging somewhere, do gdb -p <pid>, bt full and paste the results).
If strace is showing that imap-login processes are polling nicely, then the problem is outside Dovecot (i.e. kernel-related).
participants (2)
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Timo Sirainen
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V S Rao