Re: limiting the number of running slapd's

[David Wright <ichbin@shadlen.org>]

> This evening whilst checking so stuff, I noticed that there were over 30
> occasions of slapd running, this is more than likely a couple of days
> useage. How do I stop this.

Did you notice that they all had EXACTLY the same VSZ and RSS? That's 
because they aren't actually distinct processes, but threads of a single 
slapd process. That means, among other things, that slapd isn't really 
using the sum total of all those memory allocations. (Since thread 
support has sort of been welded onto Linux as an afterthought, a lot of 
tools don't really support the distinction between threads and processes.)

A multithreaded slapd by default maxes out at 32 threads (you will find 
a few more, because the few threads which aren't used to handle requests 
don't get counted toward that total). On a site with a heavy ldap querry 
load, you'll actually want to increase that number (using the threads 
directive in slapd.conf). On a site with a very small ldap querry load, 
you can get away with decreasing it, but I don't really see any 
advantage in doing so, because they won't be heavily taxing your CPU and 
memory anyway.