Mark Lim wrote:
....
> 1000 8Kb messages, 8 spoolmanagerthreads
  ^^^^               ^

If I were you -- having that kind of machine and that amount of memory,
I'd set the the number of spoolmanagerthread to be 1000. It could be
excessive in the future, if the concurrent SMTP & POP connections
created by your users and other mail servers (this depends on how many
of your users subscribed to mailing lists) wouldn't reach 1000. 

> How many spoolmanagerthreads do people typically use?  

I use 40, and that's for about 90 users.

>Any other tuning tips?

Run netstat (netstat -an | grep \:25, netstat -an | grep \:110)
periodically and see whether the total number of SMTP and POP
connections are still below the number of the spool manager thread you
define in the James config file. If the threads are all used, it's time
to increase the number. 

BTW, if you used a database for storing the messages, try to never had a
chance of getting lost connection to the database server. I noticed that
once James got one, recovery would take pretty long time.

Oki

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