Re: (ITS#5860) slapd memeory leak under openldap 2.4

[rlvcosta@yahoo.com]

Quanah,

Just a correction about the man, it was incorrect since my man was getting from cache(and so from 2.3 version). Now it is ok.

I would like a little more directions about how can be compiled openldap 2.4.13 with tcmalloc. Just need to include a lib path? Some configure parameter in openldap?

Regards,

Rodrigo.

--- On Thu, 1/22/09, Quanah Gibson-Mount <quanah@zimbra.com> wrote:

> From: Quanah Gibson-Mount <quanah@zimbra.com>
> Subject: Re: (ITS#5860) slapd memeory leak under openldap 2.4
> To: rlvcosta@yahoo.com, openldap-its@openldap.org
> Date: Thursday, January 22, 2009, 2:53 PM
> --On Thursday, January 22, 2009 4:46 PM +0000
> rlvcosta@yahoo.com wrote:
> 
> > [root@brtldp12 yum.repos.d]# ll
> /usr/man/man8/slapd.8.gz
> > -rw-r--r-- 1 root root 4392 Jan 22 03:28
> /usr/man/man8/slapd.8.gz
> >
> > [root@brtldp12 yum.repos.d]# ll
> /usr/man/man5/slapd-bdb.5.gz
> > -rw-r--r-- 1 root root 4089 Jan 22 03:28
> /usr/man/man5/slapd-bdb.5.gz
> >
> > I was expecting to find information about dncachesize
> in slapd-bdb but
> > there isn't nothing there.
> 
> [build@build11 man5]$ grep dncachesize *
> slapd-bdb.5:.BI dncachesize \ <integer>
> slapd-hdb.5:.BI dncachesize \ <integer>
> 
> It's documented for me...
> 
> .BI dncachesize \ <integer>
> Specify the maximum number of DNs in the in-memory DN
> cache. The
> default is twice the \fBcachesize\fP. Ideally this
> cache should be
> large enough to contain the DNs of every entry in the
> database.
> 
> You can also find it in the online manual pages:
> 
> <http://www.openldap.org/software/man.cgi?query=slapd-bdb&apropos=0&sektion=0&manpath=OpenLDAP+2.4-Release&format=html>
> 
> >
> > In any case slapd never respects memory limitation and
> consumes it
> > without boundaries. It also never releases any memory.
> >
> > Then after sometime the process cannot allocate more
> memory and crashes.
> 
> As Howard noted, you need to use an alternative memory
> allocator than 
> glibc.  Investigate horde or tcmalloc.
> 
> --Quanah
> 
> 
> --
> 
> Quanah Gibson-Mount
> Principal Software Engineer
> Zimbra, Inc
> --------------------
> Zimbra ::  the leader in open source messaging and
> collaboration