Slow MailScanner

[Scott Silva]

Jay Chandler spake the following on 2/13/2007 8:42 AM:
> I have two servers.
> 
> Here's one:
> 
> aconcagua#  tail -f /var/log/maillog |grep rocessed
> Feb 13 08:39:58 aconcagua MailScanner[83401]: Batch (1 message)
> processed in 6.66 seconds
> Feb 13 08:39:58 aconcagua MailScanner[83008]: Batch (1 message)
> processed in 10.06 seconds
> Feb 13 08:40:00 aconcagua MailScanner[83989]: Batch (1 message)
> processed in 6.11 seconds
> Feb 13 08:40:03 aconcagua MailScanner[83677]: Batch (1 message)
> processed in 6.84 seconds
> Feb 13 08:40:04 aconcagua MailScanner[82475]: Batch (1 message)
> processed in 6.70 seconds
> Feb 13 08:40:05 aconcagua MailScanner[82359]: Batch (1 message)
> processed in 8.74 seconds
> Feb 13 08:40:06 aconcagua MailScanner[83301]: Batch (2 messages)
> processed in 12.81 seconds
> Feb 13 08:40:07 aconcagua MailScanner[82879]: Batch (1 message)
> processed in 7.75 seconds
> Feb 13 08:40:09 aconcagua MailScanner[82035]: Batch (1 message)
> processed in 6.53 seconds
> Feb 13 08:40:11 aconcagua MailScanner[83989]: Batch (1 message)
> processed in 6.41 seconds
> Feb 13 08:40:11 aconcagua MailScanner[84046]: Batch (1 message)
> processed in 6.84 seconds
> Feb 13 08:40:12 aconcagua MailScanner[83301]: Batch (1 message)
> processed in 6.56 seconds
> 
> Here's the other:
> 
>> spacecowboy# tail -f /var/log/maillog |grep rocessed
>> Feb 13 08:38:57 spacecowboy MailScanner[54541]: Batch (9 messages)
>> processed in 252.21 seconds
>> Feb 13 08:39:12 spacecowboy MailScanner[49475]: Batch (2 messages)
>> processed in 61.60 seconds
>> Feb 13 08:39:12 spacecowboy MailScanner[53408]: Batch (4 messages)
>> processed in 86.83 seconds
>> Feb 13 08:39:14 spacecowboy MailScanner[53430]: Batch (2 messages)
>> processed in 31.38 seconds
>> Feb 13 08:39:17 spacecowboy MailScanner[54987]: Batch (8 messages)
>> processed in 166.69 seconds
>> Feb 13 08:39:18 spacecowboy MailScanner[53490]: Batch (19 messages)
>> processed in 531.03 seconds
>> Feb 13 08:39:21 spacecowboy MailScanner[53398]: Batch (14 messages)
>> processed in 384.67 seconds
>> Feb 13 08:39:30 spacecowboy MailScanner[53412]: Batch (8 messages)
>> processed in 97.58 seconds
>> Feb 13 08:39:32 spacecowboy MailScanner[54123]: Batch (2 messages)
>> processed in 62.52 seconds
>> Feb 13 08:39:38 spacecowboy MailScanner[53430]: Batch (1 message)
>> processed in 24.16 seconds
>> Feb 13 08:39:39 spacecowboy MailScanner[55686]: Batch (30 messages)
>> processed in 647.57 seconds
>> Feb 13 08:39:48 spacecowboy MailScanner[56780]: Batch (5 messages)
>> processed in 68.93 seconds
> 
> Any idea what would be causing this?  Same configuration, same MX
> priority.  The one with delays has built quite the queue backlog.
> 
There could be any number of things going wrong. Have you tried the obvious
such as linting or debugging each server?
Check that both are really identical?
Maybe a perl module difference. Have you done any basic hardware tests like
hdparm -tT or bonnie++?

-- 

MailScanner is like deodorant...
You hope everybody uses it, and
you notice quickly if they don't!!!!