Extracting those last drops of performance

[Zaeem Arshad]

On Wed, May 5, 2010 at 5:10 PM, Steve Freegard <steve.freegard at fsl.com> wrote:
> On 04/05/10 17:44, Zaeem Arshad wrote:
>>
>> I am using caching dns, ram disk for processing, clamd, compiled
>> spamassassin rules and optimized scheduler and filesystems in this
>> server. Any ideas on how I can tweak the above settings to gain more
>> MailScanner performance?
>
> Set 'Log Speed = yes' in MailScanner.conf; then plot the average time spent
> per message.  This is the key metric when tuning; it should be < 10 seconds
> and preferably 2-3 secs.
>

I have already set that but I am not plotting them today. Is there any
perl script out there or should I set on writing one? Here is a
snippet of yesterday's MS performance under heavy load.

May  4 18:58:05  MailScanner[14995]: Batch completed at 35840 bytes
per second (11183886 / 312)
May  4 18:58:05  MailScanner[14995]: Batch (50 messages) processed in
312.04 seconds
May  4 18:58:20  MailScanner[14287]: Batch completed at 7375 bytes per
second (2866715 / 388)
May  4 18:58:20  MailScanner[14287]: Batch (50 messages) processed in
388.70 seconds
May  4 18:58:22  MailScanner[16953]: Batch completed at 14607 bytes
per second (4765445 / 326)
May  4 18:58:22  MailScanner[16953]: Batch (50 messages) processed in
326.23 seconds
May  4 18:58:39  MailScanner[14596]: Batch completed at 40698 bytes
per second (13424209 / 329)
May  4 18:58:39  MailScanner[14596]: Batch (50 messages) processed in
329.84 seconds
May  4 18:58:39  MailScanner[14892]: Batch completed at 15236 bytes
per second (5905691 / 387)
May  4 18:58:39  MailScanner[14892]: Batch (50 messages) processed in
387.61 seconds
May  4 18:58:45  MailScanner[22446]: Batch completed at 11210 bytes
per second (3952639 / 352)
May  4 18:58:45  MailScanner[22446]: Batch (50 messages) processed in
352.59 seconds
May  4 18:58:53  MailScanner[22253]: Batch completed at 34643 bytes
per second (12635074 / 364)
May  4 18:58:53  MailScanner[22253]: Batch (50 messages) processed in
364.72 seconds
May  4 18:59:06  MailScanner[16612]: Batch completed at 34091 bytes
per second (12036761 / 353)
May  4 18:59:06  MailScanner[16612]: Batch (50 messages) processed in
353.07 seconds
May  4 18:59:17  MailScanner[12768]: Batch completed at 30726 bytes
per second (11356957 / 369)
May  4 18:59:17  MailScanner[12768]: Batch (50 messages) processed in
369.61 seconds
May  4 18:59:28  MailScanner[13267]: Batch completed at 31812 bytes
per second (11076141 / 348)
May  4 18:59:28  MailScanner[13267]: Batch (50 messages) processed in
348.17 seconds
May  4 18:59:30  MailScanner[15241]: Batch completed at 71356 bytes
per second (23231603 / 325)
May  4 18:59:30  MailScanner[15241]: Batch (50 messages) processed in
325.57 seconds
May  4 18:59:56  MailScanner[15478]: Batch completed at 12213 bytes
per second (4247264 / 347)
May  4 18:59:56  MailScanner[15478]: Batch (50 messages) processed in
347.75 seconds


>  Are you using
> Bayes?  If so - using which storage method?

Yes I am using file based bayes stored on tmpfs. I do take regular backups.


--
Zaeem