https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=232940
Bug ID: 232940
Summary: Investigate poor ncsd performance reported in bug
230491
Product: Base System
Version: CURRENT
Hardware: Any
OS: Any
Status: New
Keywords: needs-qa, patch, performance
Severity: Affects Only Me
Priority: ---
Component: bin
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected], [email protected],
[email protected]
Depends on: 230491
See comments #2, 5, 6, and 14 on bug 230491.
> The built-in caching doesn't seem useful for this case. Enabling it results
> in a test run creating this unfortunate entry in top:
>
> 63957 root 9 52 0 24000K 4696K uwait 19 9:15 268.91% nscd
>
> and actually *slows down* stat(1) in my tests - /usr/src goes from 22 seconds
> to almost 90, and my CVS repository scan goes from 55 seconds to 2 minutes.
> Reducing thread count improves performance with nscd, but at "threads 1" it's
> still 52s vs 22s uncached.
Referenced Bugs:
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=230491
[Bug 230491] stat(1): Improve performance with getpwuid() and getgrgid()
caching
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