[tpop3d-discuss]tpop unable to handle load

[Rich, Whidbey Telecom NOC]

Hi Richard,

We process an average of 400,000 POP3 sessions per day using tpop3d 
1.4.2 (a version we found to have no serious issues).

Our tpop3d config specifies max-children at 30, and timeout at 120 
seconds. We have 2 load-balanced Dell dual-2.4 Ghz 2650's dedicated to 
POP, connected to an NFS storage cluster.

Did you say you only have a single server handling all incoming email, 
POP3, and storage?

Rich Sandberg
richs@whidbey.net
Whidbey Telecom Network Operations

On Wednesday, September 8, 2004, at 02:24 PM, Richard Stockton wrote:

> Hi there,
>
> I work for an ISP that handles about 3 million emails per day.
> We use postfix for that (works great!).
>
> We also handle pop3 for about 5500 users, and we have been using
> tpop3d (version 1.5.3) for that.  However, it doesn't seem to be
> keeping up with the load.  When it gets to 20 or so people popping
> at the same time, it starts complaining and dropping connections.
> I have upped the max children to 100 in both main.c and netloop.c,
> but I still get a LOT of these messages;
>
> Sep  8 13:42:56 mail tpop3d[94605]: listeners_post_select: rejected 
> connection from nnn.nnn.nnn.nnn to local address nnn.nnn.nnn.nnn:110 
> owing to high load
>
> Should tpop3d be able to handle 20+ simultaneous connections?  If
> so, what am I doing wrong?  If not, can anyone recommend something
> else that will handle high loads?  Preferably something that has
> hooks into mysql so I can easily do pop-before-smtp.
>
> System Info:  FreeBSD 5.0 box with dual 733MGhz processors, 1 gig
> of RAM and multiple harddrives (about 100 Gigs in all).  This box
> runs both postfix (maildir) and tpop3d, but only tpop has problems.
>
> Thanks in advance for any help.
>  - Richard Stockton
>
>
>
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