On 28.02.2010 23:18, Rainer Jung wrote:
1) Logging Performance on ISAPI/Windows
The logging changes for Windows seem to dramatically slow down log
performance. That's not a problem when having only occasional info etc.,
but when switching to debug or trace log operation ow gets really slow.
E.g. shutting down takes about 5 minutes, one jkstatus call more than a
minute. I did not built with explicit JK_LOG_LOCKING define, so maybe
it's the mode 'a+c' change. Didn't have time for one more test. 1.2.28
does not show that behaviour. There we can log about 20 lines before the
clock advances by one 15ms tick, with 1.2.30 each log line takes between
15 and 200 ms.
One addition: the combination of the a+c mode and fflush() shows the
problem. As soon as I remove one of the two, perforemance is fine.
It's unfortunate, that the OS doesn ot allow to specify a fflush
interval, e.g. the file should be flushed every 500 ms. There's a
flushall() call, that could be used for something like that...
Regards,
Rainer
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