Last call for 2.4.3 problems

[Ulrich Schmid]

on 17/1/06 18:51 Russ Allbery wrote:
> Ulrich Schmid <schmid at switch.ch> writes:
> 
>>on 13/1/06 20:02 Russ Allbery wrote:
> 
> 
>>>I'm not at all sure that my messages are going through, and I seem to
>>>only be getting mail from the list intermittantly.  But let's see if
>>>this makes it through.
> 
> 
>>>I've been running 2.4.3 for a while on one of my systems, and it seems
>>>generally okay.  I'm therefore planning on making the release official.
>>>Has anyone else run into any problems?  (I'll respond to Jeff's message
>>>in just a moment.)
> 
> 
>>I observed a significant performance loss with 2.4.3 compared to 2.4.1.
>>Trying 2.4.2 I saw the same problem.  Obviously this is caused by
>>history functions (history sync/write etc), since they take longer and
>>history disk I/O increased.
> 
> 
> Huh, that's surprising, particularly since there are various performance
> fixes in 2.4.3 (although I think they're mostly with CNFS).  I can't think
> of what would have changed in the history code between 2.4.3 and 2.4.1 to
> have caused that....
> 


I have done some stathist measurements. It looks like that HISsync tooks much
longer with 2.4.3 than with 2.4.1, which may have an influence to other history
functions.
I'm running stathist about 10 minutes and here are the results:

INN 2.4.1
Function            Invoked       Total(s)    Min(ms)    Avg(ms)    Max(ms)

HIScacheadd           73341       0.365222      0.003      0.005      0.496
HIScachelookup        87677       1.014498      0.003      0.012      1.214
HISfilesfor             171       0.203499      0.009      1.190     80.434
HIShavearticle        36839      10.696098      0.006      0.290    168.724
HISsync                   2       0.000096      0.047      0.048      0.049
HISwrite              36502      41.969053      0.013      1.150   1282.540
  HISsync                36       0.000969      0.018      0.027      0.132


INN 2.4.3
Function            Invoked       Total(s)    Min(ms)    Avg(ms)    Max(ms)

HIScacheadd           61302       0.316577      0.003      0.005      0.140
HIScachelookup        60974       0.878118      0.004      0.014    114.797
HISfilesfor              34       0.106243      0.016      3.125     13.446
HIShavearticle        30704      39.454141      0.006      1.285   1956.525
HISsync                   2       0.687659     43.738    343.829    643.921
HISwrite              30598      81.179581      0.012      2.653   2267.893
  HISsync                29      59.501861   1868.885   2051.788   2267.824


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Ulrich Schmid                                 http://www.switch.ch/
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