Re: Excessive Processor Usage

[Sam Johnston <samj@faredge.com.au>]

Chris,

Finally a response... I do actually use nscd on some of the machines 
(although not all), and there's only a few machines anyway. Thanks for the 
suggestion though. Is it normal to see so many processes running? It seems 
they periodically need to do a lot of work (it doesn't seem to matter 
whether or not they're processing many queries) and then go back to 
'ticking over' at about 0.5. Surely people are using [Open]LDAP at much 
larger sites without these problems?

 - samj

At 08:16 AM 20/02/01 -0500, Christopher Audley wrote:
> Keep in mind that nss_ldap will need to do uid number to uid name
> translations
> every time someone types 'ls'.  This could potentially create a lot of
> search traffic
> in and of itself.  A solution to this is the name service cache deamon (
> nscd )
> which works with nss.  This deamon, as its name suggests, caches the results
> of nss lookups ( from any nss service ) so that traffic against the server
> is reduced.
>
> Cheers
> Chris
>
> ----- Original Message -----
> From: "Sam Johnston" <samj@faredge.com.au>
> To: <openldap-software@openldap.org>
> Sent: Monday, February 19, 2001 9:44 AM
> Subject: Excessive Processor Usage
>
>
> > Hello all,
> >
> > I'm another happy OpenLDAP customer... although there is one thing which I
> > find surprising - that being the amount of work it apparently takes to
> read
> > an entry in a database and pump it out onto the network. As you can see,
> > these processes (of which there appear to be way to many for a start) are
> > chewing processor time on the dual PII-266 like nothing else. Why might
> > this be the case? What can be done to stop it? The clients are a small
> > handful of linux boxes using nss_ldap.
> >
> >   - samj
> >
> > root     13549  0.0  1.0  9240 5176 ?        S    Jan30   0:00 slapd
> > root     13553  0.0  1.0  9240 5176 ?        S    Jan30   0:40 slapd
> > root     13554  2.5  1.0  9240 5176 ?        S    Jan30 756:27 slapd
> > root     13557  0.5  1.0  9240 5176 ?        S    Jan30 150:39 slapd
> > root     13558  0.4  1.0  9240 5176 ?        S    Jan30 147:08 slapd
> > root     13559  0.4  1.0  9240 5176 ?        S    Jan30 142:58 slapd
> > root     13632  0.4  1.0  9240 5176 ?        S    Jan30 147:56 slapd
> > root     13768  0.5  1.0  9240 5176 ?        S    Jan30 154:22 slapd
> > root     13879  0.4  1.0  9240 5176 ?        S    Jan30 143:24 slapd
> > root     14270  0.4  1.0  9240 5176 ?        S    Jan30 146:48 slapd
> > root     14331  0.5  1.0  9240 5176 ?        S    Jan30 148:48 slapd
> > root     14647  0.4  1.0  9240 5176 ?        S    Jan30 145:24 slapd
> > root     14724  0.4  1.0  9240 5176 ?        S    Jan30 148:16 slapd
> > root     14930  0.5  1.0  9240 5176 ?        S    Jan30 150:56 slapd
> > root     15220  0.4  1.0  9240 5176 ?        S    Jan30 146:16 slapd
> > root     15253  0.4  1.0  9240 5176 ?        S    Jan30 147:48 slapd
> > root     15306  0.4  1.0  9240 5176 ?        S    Jan30 144:54 slapd
> > root     15343  0.4  1.0  9240 5176 ?        S    Jan30 146:42 slapd
> > root     15429  0.4  1.0  9240 5176 ?        S    Jan30 146:45 slapd
> > root     15619  0.4  1.0  9240 5176 ?        S    Jan30 146:24 slapd
> > root     15686  0.4  1.0  9240 5176 ?        S    Jan30 147:34 slapd
> > root     15693  0.4  1.0  9240 5176 ?        S    Jan30 146:30 slapd
> > root     15694  0.5  1.0  9240 5176 ?        S    Jan30 149:53 slapd
> > root     16012  0.4  1.0  9240 5176 ?        S    Jan30 145:32 slapd
> > root     16104  0.4  1.0  9240 5176 ?        S    Jan30 147:43 slapd
> > root     16383  0.5  1.0  9240 5176 ?        S    Jan30 149:15 slapd
> > root     16390  0.5  1.0  9240 5176 ?        S    Jan30 148:49 slapd
> > root     16649  0.4  1.0  9240 5176 ?        S    Jan30 146:33 slapd
> > root     16662  0.5  1.0  9240 5176 ?        S    Jan30 150:24 slapd
> > root     16739  0.4  1.0  9240 5176 ?        S    Jan30 145:57 slapd
> > root     16752  0.5  1.0  9240 5176 ?        S    Jan30 149:17 slapd
> > root     16959  0.4  1.0  9240 5176 ?        S    Jan30 147:49 slapd
> > root     16994  0.5  1.0  9240 5176 ?        S    Jan30 148:44 slapd
> > root     17027  0.5  1.0  9240 5176 ?        S    Jan30 151:13 slapd
> > root     17172  0.4  1.0  9240 5176 ?        S    Jan30 147:41 slapd
> >
> >