rejecting connections on daemon MTA: 150 children, max 150

[RICCARDO]

My mail server handles about 50000 messages a day and sendmail version
is 8.12.10.
From one month sendmail continues to reject connections showing:

rejecting connections on daemon MTA: 150 children, max 150

I tried to increase MAX_DAEMON_CHILDREN from 50 to 150 but nothing !

What can you suggest me to debug and solve this problem ?

[Scott Grayban]

RICCARDO wrote:
> My mail server handles about 50000 messages a day and sendmail version
> is 8.12.10.
> From one month sendmail continues to reject connections showing:
>
> rejecting connections on daemon MTA: 150 children, max 150
>
> I tried to increase MAX_DAEMON_CHILDREN from 50 to 150 but nothing !
>

Tried a higher value then what its maxing out at? You said you increased it
from 50 to 150 so that should be clue.

[RICCARDO]

This morning I see rejecting connections are reduced (about 300
against 1200 of last days).
But what happens if I increase sendmail childrens ? My mail server run
also other applications as Squid.
Load average is about 2.15.

[Scott Grayban]

Get a better box then with more memory and faster core.

[RICCARDO]

I monitored cpu and load average is low (2÷4) so I think problem is
Ram size ?
My top command shows :

11:10:29 up 295 days, 52 min, 3 users, load average: 3.44, 2.94,
2.53
166 processes: 164 sleeping, 2 running, 0 zombie, 0 stopped
CPU states: cpu user nice system irq softirq iowait
idle
total 12.1% 0.0% 12.1% 0.0% 0.0% 0.0%
75.7%
Mem: 1032748k av, 996528k used, 36220k free, 0k shrd,
91800k buff
377592k active, 569988k inactive
Swap: 3068372k av, 254108k used, 2814264k free
335900k cached

What do you think ? Free Ram is only 36220k