Speed tests of 4.48-4.49-4.50

[Julian Field]

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I have done some speed tests on a batch of mail on 2 different  
servers. 1 server is Opteron-based, the other Xeon-based.
I was not using a DNS server on the MailScanner itself, but our main  
department one which should manage to cache a lot of it.

Conclusion is that 4.49 is 11% faster than 4.48 (which sounds very  
suspicious to me, other people have reported much better than that).  
4.50 is 15% or so faster than 4.49, which corresponds almost exactly  
with the cache hit rate. The more spammers you have who send the  
exact same message many times, and the number of virus-laden messages  
you are seeing, the higher your speedup will be.

It would be great if another few people could do quantitative tests  
on 4.49 versus 4.48 as I don't believe the figures I have got.

Here are the gory details. Many of the tests were run twice to try to  
counteract the effects of not having many of the DNS responses cached  
by BIND on the DNS server I'm using.

9001 messages taken from one MX server on 2006-01-03

Dual 2.2GHz Opteron, 4GB RAM, 70GB disk 15,000rpm SCSI

4.48 (4.50 with cache off and old forking code)
20:47:00 - 21:18:45 = 31:45 = 31*60+45 = 1905
408 K messages/day

4.49 (4.50 with cache off)
19:02:30 - 19:41:41 = 39:11 = 39*60+11 = 2351
331 K messages/day
331/408*100 < 100% XXX
2nd Run
21:22:43 - 21:51:52 = 29:09 = 29*60+09 = 1749
445 K messages/day
445/408*100 = 9% faster than 4.48

4.50 (4.50 with cache on)
19:48:36 - 20:13:37 = 25:01 = 25*60+1 = 1501
518 K messages/day
17% cache hit rate
518/331*100 = 56% faster than 4.49
2nd run
21:57:41 - 22:23:00 = 25:19 = 25*60+19 = 1519
512 K messages/day
512/445*100 = 15% faster than 4.49-2

4.49 run was done first, suspect 156% due to DNS caching

========================================================
Dual 2.4GHz Xeon, 2GB RAM, 36GB disk 10,000rpm SCSI

4.48 (4.50 with cache off and old forking code)
12:53:30 - 13:48:07 = 54:37 = 54*60+37 = 3277
237 K messages/day
2nd run
16:06:14 - 17:00:44 = 54:30 = 54*60+30 = 3270
238 K messages/day

4.49 (4.50 with cache off)
10:30:09 - 11:29:11 = 59:02 = 59*60+2 = 3542
220 K messages/day
Ignore run 1
2nd run
13:54:22 - 14:43:29 = 49:07 = 49*60+7 = 2947
264 K messages/day
4.49 11% faster than 4.48
15:10:40 - 15:58:48 = 48:08 = 48*60+8 = 2888
270 K messages/day
4.49 13% faster than 4.48

4.50 (4.50 with cache on)
12:01:20 - 12:43:04 = 41:44 = 41*60+44 = 2504
311 K messages/day
4.50 18% faster than 4.49
2nd run
14:53:35 - 15:07:54 = 14:19 = 14*60+19 = 859
905 K messages/day
This must be due to DNS caching, it is so much higher

- -- 
Julian Field
www.MailScanner.info
Buy the MailScanner book at www.MailScanner.info/store
PGP footprint: EE81 D763 3DB0 0BFD E1DC 7222 11F6 5947 1415 B654


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