Re: Openldap out of memory problem

["matthew sporleder" <msporleder@gmail.com>]

On 6/27/07, jsianes@andaluciajunta.es <jsianes@andaluciajunta.es> wrote:
> Hello, I have a problem in a production environment using Openldap 2.2.13. The
> problem is, even establishing a reduced cachesize for Berkeley backend, my
> openldap server starts to consume more and more memory until all RAM is
> exhausted, causing server stop running (and sometimes backend corruption). I
> have followed indications included in faq-o-matic to calculate an accurate
> cache size for BDB backend (8MB), but the problem doesn't solves. At
> beginning, openlaps starts with few memory (as configuration indicates) but
> later more and more memory is consumed by the process. Here is the information
> about my ldap server and service in order you can give a solution. I want that
> mi slapd process doesn't cosume all fisical memory, basically.
>
>
> Server:
>  - RAM: 1GB
>  - Swap: 1GB
>
>
> Openldap:
>  - version: 2.2.13
>  - sizelimit: 5000
>
>
> Backend:
>   - Type: bdb
>   - checkpoint: 512 30
>   - cachesize: 5000
>
>
> DB_CONFIG:
>   - Cache (8MB): set_cachesize 0 8388608 1
>   - Other options:
>     set_lg_regionmax 262144
>     set_lg_bsize 2097152
>     set_lg_dir /var/lib/ldap/logs
>     set_lg_max 52428800
>     set_flags DB_LOG_AUTOREMOVE
>   - dn2id.bdb size: 177MB
>   - id2entry.bdb size: 555MB
>
>
> Top information:
>   PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  SWAP COMMAND
> 12547 ldap      19   0  509m 139m  13m S  1.3 13.9   9:30.32 369m slapd
>
>
> If I execute a pmap over slapd PID, there is a lot of RAM used by 'anon' piece
> of memory. Any commentary will be very appreciated. Thanks.


While there could easily be a memory leak in your older version of
openldap, can you try to lower the cachesize and idlcachesize in your
slapd.conf?