MailScanner Eating Up System Proccesses {Scanned by HJMS}

[Furnish, Trever G]

Some things to try:

vmstat 1

...are there many processes in the blocked state (second column)?  If so,
perhaps you have an I/O problem.  Also shows how much swap is used (ought to
be low and slowly changing or never changing) and how much free memory there
is.

free

...shows statistics about memory and swap usage.

ps auxww | grep MailScanner

...the STAT column (8th, on my machine) may give you some clues - if you see
D it's blocked on something, probably I/O.  If you see R, it's in a run
queue waiting for the cpu.  Probably not going to see Z, but that's defunct,
meaning the proc is dead and the parent hasn't cleaned it up yet.

pstree -ap | less

...assuming Linux.  If HPUX, try UNIX95= ps -efH | more instead.  This
sometimes makes it easier to see important parent/child relationships
between processes.

Try turning off spamassassin and restarting MailScanner.
Try enabling debugging in MailScanner and SpamAssassin.
Try turning off rbl checks.
Try turning off razor/Pyzor/DCC checks.
Try turning off Bayes.

iostat 1

... may show more detail about any i/o bottleneck if you have multiple
drives.

HTH,
Trever


-----Original Message-----
From: Vernon Webb [mailto:vernon at COMP-WIZ.COM]
Sent: Tuesday, September 09, 2003 5:52 PM
To: MAILSCANNER at JISCMAIL.AC.UK
Subject: MailScanner Eating Up System Proccesses {Scanned by HJMS}


Now I have a new problem. When I start MailScanner it seems to tie up my
system so bad that I can't even access web pages. When I look at the system
processes there are a number of MailSacanner processes running eating up the
CPU, some processes as high as 13% and then they go down from there to like
9% , 7% and so forth. You add them all up and the system is almost at a
standstill. It never used to do this so I don't understand why it is. Any
ideas?

Vernon Webb


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