[Mimedefang] Using TMPFS

[Joseph Brennan]

We're still trying to diagnose this recurring problem, which is
holding up production.

Apr  8 09:41:08 marionberry sm-mta[5385]: [ID 801593 mail.error] 
h38Df85w005385: Milter (mimedefang): error connecting to filter: Connection 
refused by /var/spool/MIMEDefang/mimedefang.sock
Apr  8 09:41:08 marionberry sm-mta[5385]: [ID 801593 mail.info] 
h38Df85w005385: Milter (mimedefang): to error state


This is with a very short mimedefang-filter that runs no tests
but just says return action_accept() to everything.  Max slaves
is 200 and maximum actually running is about 25.

Noting the top output:

load averages:  4.18,  4.24,  3.18 09:41:16
205 processes: 198 sleeping, 2 running, 1 zombie, 4 on cpu
CPU states: 27.1% idle, 18.3% user, 16.7% kernel, 37.8% iowait,  0.0% swap
Memory: 9216M real, 7767M free, 650M swap in use, 8050M swap free

The iowait is terrible, and actually this box spikes as high as
26 even without mimedefang.  So we have a problem there.

But there's loads of memory.  We were thinking of using TMPFS
for mimedefang's files.  Has anyone done that?



Joseph Brennan          Columbia University in the City of New York
postmaster at columbia.edu                 Academic Technologies Group