I found that the user limits were by default 1024 and I could not set the nsslapd-maxdescriptors higher than that, so I upped the default limits and changed nsslapd-maxdescriptors to 2048. We'll see how that works out. Thanks Richard and George!

-----Original Message-----

From: Richard Megginson rmeggins@redhat.com Sent: Mar 2, 2007 5:55 PM To: MJD Shop Account mjdshop@earthlink.net, "General discussion list for the Fedora Directory server project." fedora-directory-users@redhat.com Cc: George Holbert gholbert@broadcom.com Subject: Re: [Fedora-directory-users] not enough file descriptors

MJD Shop Account wrote:

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ah! only 1024. What is considered a reasonable value? Is it setting this or picking it up from the defaults such as ulimits?

The server sets this itself. So you have to set the value yourself.

See http://www.redhat.com/docs/manuals/dir-server/pdf/ds71cli.pdf - search for nsslapd-conntablesize and nsslapd-maxdescriptors

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I assume I need to do this on all of the multi-masters and consumers to be the same, or do I? Does it propagate? I'm not sharing the config tree among different servers.

-----Original Message-----

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From: George Holbert gholbert@broadcom.com Sent: Mar 2, 2007 5:16 PM To: MJD Shop Account mjdshop@earthlink.net, "General discussion list for the Fedora Directory server project." fedora-directory-users@redhat.com Subject: Re: [Fedora-directory-users] not enough file descriptors

What is the value of the "nsslapd-maxdescriptors" attribute on cn=config?

MJD Shop Account wrote:

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I have a problem with running out of file descriptors. I get this repeating message periodically in the /opt/fedora-ds/slapd-<servername>/logs/errors file: [02/Mar/2007:13:25:45 -0500] - Not listening for new connections - too many fds open [02/Mar/2007:13:25:46 -0500] - Listening for new connections again [02/Mar/2007:13:25:47 -0500] - Not listening for new connections - too many fds open [02/Mar/2007:13:25:47 -0500] - Listening for new connections again ...

When this happens, the users cannot log in for long periods and get angry. Imagine that. I do have this in a multi-master configuration with a second master, which is different hardware and does not show this error.

I read the tuning page http://directory.fedora.redhat.com/wiki/Performance_Tuning#Linux, which recommends updating the filedescriptors limit like so: echo "64000" > /proc/sys/fs/file-max

However mine is already well above that: # cat /proc/sys/fs/file-max 128456

How much higher should I be setting it? I am running RHEL 4 update 4, single Pentium III 1.4GHz processor, 1280MB of memory.

I don't have any settinsg in sysctl.conf or /etc/security/limites for soft/hard limits, how do I tell what the defaults on soft/hard limits are?

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