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Re: 99.9% CPU usage still, production system
At 07:28 AM 2001-10-21, Nick Urbanik wrote:
>Thank you to all the good suggestions to my previous questions. I have
>added ulimit -n 16000 to /etc/init.d/ldap, and have rebuilt the indexes
>after stopping the system late at night.
Note that slapd won't use more descriptors than FD_SETSIZE.
On some systems, this can be redefined a compile time
(-DFD_SETSIZE=16000), but on others it requires hacking
system headers and, possibly, rebuilding the world.
>However, I still have 99.9% CPU usage occasionally, and often students
>cannot log in and get their home directories. We are using LDAP as a
>NIS replacement. I am desperate, and have expended much energy in
>this. With linux-2.4.10-ac12 the slapd process no longer dies, but the
>system is not available to our students at the start of each laboratory
You might ask folks on the firstname.lastname@example.org list for details
on how to improve nss_ldap use of the directory. From what I
gather, using a caching daemon such as nscd is recommended.
I note that if slapd appears to be in a tight select busy loop,
you might experiment with usleep() within this loop.