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Re: Apache and log4perl (high performance logging?)

by jasonk (Parson)
on Feb 11, 2009 at 20:53 UTC ( #743161=note: print w/replies, xml ) Need Help??


in reply to Apache and log4perl (high performance logging?)

Mike Schilli mentions 30K ops/sec by an "in-memory" appender, which sounds high for something writing to disk. Call me a tad skeptical on this claim (perhaps it is a measurement of the library's efficiency sans disk writing).

An "in-memory" appender means exactly what it sounds like it means. It's not writing to disk, it's keeping the log entries in memory. If your performance concern is with the speed that log entries can be written to disk, there are plenty of alternatives to simple logfiles:


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[tye]: probably something in the init subsystem that does the mounting that you could disable and reboot.
davido needs to close laptop to board flight home from yapc.
[davido]: I'll look into it in a few hours probably.
[davido]: when i do get to that point I think I'll do it in a vm snapshot just in case. :)
[oiskuu]: tye, you were right: loginuid/sessionid are part of task struct if compiled with AUDITSYSCALL. I have some doubts if you should actually depend on that feature.
[Corion]: oiskuu: Depends on what you want to do with that information
[tye]: I'm not depending on that feature. But I could in this environment. I'm using getlogin(). shrug
[Corion]: For benign logging (which user started this DB instance), it's OK
[tye]: We use auditd for security monitoring. So we can rely on auditing being enabled. I'm not sure who would want to not be able to audit. Maybe some VM inside another system with audit?

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