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Asked: 2026-05-11T03:26:04+00:00

I have a slapd LDAP server which is critical to my application. I want

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I have a slapd LDAP server which is critical to my application. I want to monitor it in order to detect when it has become over-loaded or if it fails.

Unfortunately we are stuck with a very old edition of slapd which has a known bug: It cannot cope with more than 64 concurrent connections. If a client attempts to open any more connections slapd blocks, causing all kinds of problems.

I have been asked to make a tool which will find the number of connections open at any given moment – this might be used in an automatic monitoring tool, but how can I find out the state of slapd? Is there a way to do it?

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  1. The best tool for that is lsof.

    lsof -i tcp:389

    will show you all TCP connections to your LDAP server.

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