Re: slapd CPU usage / threading.

[Howard Chu <hyc@symas.com>]

Alex Balashov wrote:
> Hi everyone,
>
> I seem to have come upon a bizarre problem having installed the Debian
> sarge binary package of slapd and configured some parameters (e.g. ACLs,
> rootdn) for use with samba-tng.
>
> In particular, slapd is constantly utilising 100% CPU, and also causes
> klogd to consume considerable time.  Curiously, the log output from klogd
> is unavailable either on console or in the syslogs.  This is completely in
> idle run;  no queries are coming from any services or clients at this
> time.
>
> There is no interesting information about this in the system logs from 
> slapd, either.
>
> For further investigation, I attach 'strace' to the PID of the 'slapd'
> process and am spammed at a blinding pace with:
>
>   futex(0xb743dbf8, FUTEX_WAIT, 2930, NULL) = -1 ENOSYS (Function not
> implemented)
>
> I think it would be agreeable to reason to conjecture that this is the
> cause of the problem.
>
> I am using BDB, glibc 2.3.5, kernel 2.6.13.4 on an Athlon 64 3000+.  Your
> insights are appreciated!

This sounds like a mismatch between glibc and the kernel. Nothing that's 
controlled by OpenLDAP.

--
 -- Howard Chu
 Chief Architect, Symas Corp.  http://www.symas.com
 Director, Highland Sun        http://highlandsun.com/hyc
 OpenLDAP Core Team            http://www.openldap.org/project/