Re: [exim] exim 4.7 slowness

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Author: Stuart Rowan
Date:  
To: exim-users
Subject: Re: [exim] exim 4.7 slowness
DKIM signatures get verified by default in 4.7x (though pass/fail of
verification is merely logged rather than anything unexpected) and I don't
think this was true in 4.69?

Cheers,
Stu.

CauBa wrote, on 11/01/11 01:51:
> Dear exim users/developers,
>
> I upgraded exim from 4.69 to 4.73 a few weeks ago due to the vulnerability described in "http://www.exim.org/lurker/message/20101210.164935.385e04d0.en.html"
>
>
> Since then, I notice that my system struggles to keep up with the volume of email that it had little problem handling in 4.69
>
> Has anyone else seen a similar behaviour ?
>
> The pertinent config settings are:
>
> received_headers_max = 40
> message_size_limit = 20M
> recipients_max = 1000
> queue_only          = yes
> queue_run_max       = 250
> remote_max_parallel = 50

>
> connection_max_messages = 750
>
> system info:
> Linux 2.6.18-194.26.1.el5 #1 SMP
> dual quad E5540 @ 2.53GHz (16 logical cores)
> 16GB RAM
>
>
>
> typical daily stats for 4.73:
> Grand total summary
> -------------------
>                                                                    At least one address
>    TOTAL               Volume   Messages Addresses     Hosts      Delayed       Failed
>    Received              87GB     905747                  99    6693  0.7%      0  0.0%
>    Delivered            110GB     1535583    1539352        14
>    Rejects                           430                  12
>    Temp Rejects                     3284                  27

>
>
> Time spent on the queue: all messages
> -------------------------------------
>
> Under   1m    23750   3.1%    3.1%
>          5m    47952   6.2%    9.3%
>         15m    43763   5.7%   15.0%
>         30m    44933   5.8%   20.8%
>          1h    86275  11.2%   32.0%
>          3h   240461  31.2%   63.3%  *****only 63% after 3h****
>          6h   181135  23.5%   86.8%
>         12h    89728  11.7%   98.5%
>          1d     6163   0.8%   99.3%
> Over    1d     5551   0.7%  100.0%

>
> Time spent on the queue: messages with at least one remote delivery
> -------------------------------------------------------------------
>
> Under   1m    23750   3.1%    3.1%
>          5m    47952   6.2%    9.3%
>         15m    43763   5.7%   15.0%
>         30m    44933   5.8%   20.8%
>          1h    86275  11.2%   32.0%
>          3h   240461  31.2%   63.3%
>          6h   181133  23.5%   86.8%
>         12h    89728  11.7%   98.5%
>          1d     6161   0.8%   99.3%
> Over    1d     5551   0.7%  100.0%

>
>
>
>
> typical daily stats for exim-4.69-4
>
> Grand total summary
> -------------------
>                                                                    At least one address
>    TOTAL               Volume   Messages Addresses     Hosts      Delayed       Failed
>    Received              80GB     789440                  98   53523  6.8%      0  0.0%
>    Delivered            159GB     1572696    1582306        11
>    Rejects                           950                   3
>    Temp Rejects                    10250                  16

>
>
> Time spent on the queue: all messages
> -------------------------------------
>
> Under   1m   237858  30.2%   30.2%
>          5m   149936  19.0%   49.2%
>         15m   148053  18.8%   68.0%
>         30m   112415  14.3%   82.3%
>          1h    95188  12.1%   94.3%
>          3h    44596   5.7%  100.0%   *****100% after 3h****
>          6h        2   0.0%  100.0%

>
> Time spent on the queue: messages with at least one remote delivery
> -------------------------------------------------------------------
>
> Under   1m   237858  30.2%   30.2%
>          5m   149936  19.0%   49.2%
>         15m   148053  18.8%   68.0%
>         30m   112415  14.3%   82.3%
>          1h    95188  12.1%   94.3%
>          3h    44596   5.7%  100.0%
>          6h        2   0.0%  100.0%

>
>
>
> Thank you in advance for anyone who takes the time to look at this.
>
> Cau Ba
>
>
>
>