[Mailman-Developers] Mailman problem!

[Simmo Siil]

I'm using Mailman with Sendmail on SuSE.
I have created several lists (on the list about 50...60 people each)
Most of the people in the list are same server users.
When I'm sending an email to the list, the server hangs (even working with 
the shell account is very slow).
When I'm looking at the top, then i see
   PID   USER        PR  NI  VIRT  RES  SHR S %CPU %MEM TIME+  COMMAND
17749 wwwrun    17   0 10884 9260 4416 S 10.3  7.8   0:00.64 httpd2-prefork
17612 wwwrun    16   0   9388 7276 3076 S  6.1   6.2   0:02.53 
httpd2-prefork
17770 wwwrun    15   0   4852 2400 2280 S  0.6   2.0   0:00.02 
httpd2-prefork
17772 wwwrun    15   0   4852 2400 2288 S  0.6   2.0   0:00.02 
httpd2-prefork
17773 wwwrun    18   0   4852 2400 2288 S  0.6   2.0   0:00.02 
httpd2-prefork

same time in the /var/log/messages is see
Sep  9 12:25:00 gw /USR/SBIN/CRON[17775]: (mailman) CMD (/usr/bin/python -S 
/usr/lib/mailman/cron/gate_news)

And in the mailog i see that the mail has sent to the list
Sep  9 08:42:50 gw sendmail[12986]: i895gmhT012982: 
to="|/usr/lib/mailman/mail/mailman post list", ctladdr=<list at domain> (2/0), 
delay=00:00:02, xdelay=00:00:01, mailer=prog, pri=34098, dsn=2.0.0, 
stat=Sent
and list-bounces at domain has sent it to the users and sendmail sends mail to 
the users very slowly.
and server starts to hang. Sendmail sends the mail abount 5 to 10 min. At 
the same time no other user can't send mail properly (sending mail starts to 
hang).

Also wery often stops working and i see next picture:
gw:/ # rcmailman restart
Shutting down mailman failed
Starting mailmanThe master qrunner lock could not be acquired.  It appears 
as though there is
a stale master qrunner lock.  Try re-running mailmanctl with the -s flag.    
done
gw:/ # /usr/lib/mailman/bin/mailmanctl -s start
Starting Mailman's master qrunner.
gw:/ # rcmailman restart
Shutting down mailman                       done
Starting mailman                                 done

How i can solv this problem?

Thank You,
Saapakusti

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