[Fedora-directory-users] reducing memory footprint?

[George Holbert]

Hi Gerald,

HP has a tuning guide for their bundled Netscape DS, which may be 
somewhat useful to you for this:

http://docs.hp.com/en/7152/nds621_tuning_sizing_13.pdf

Of course, Fedora DS and HP's DS are not the same product, but they have 
common heritage.

Excerpt:
> The Netscape Directory Server for HP-UX caches entry and indexing 
> information in memory. HP-UX requires at
> least 256 MB of memory for a small deployment. But for large directory 
> servers, 512MB to 4GB RAM is needed for
> best performance. To estimate how much RAM needed for Directory Server 
> on a system, please use the following
> formula:
> Total_NDS_RAM = 1.2 * (base_RAM_need_for_slapd_process + caches)
> Where
> base_RAM_needed_for_slapd_process = 32MB + nsslapd-threadnumber * 1MB
> caches = dbcache + SUM(all entry caches) + import_cache
> Explanation:
> · 1.2: 20% additional RAM needed for slapd process to handle incoming 
> LDAP operations. 20% is an
> estimated number, and it should be sufficient. However, testing is 
> needed to ensure that it is enough before
> going into production.
> · 32MB: is the size of the slapd process.
> · nsslapd-threadnumber *1MB: each thread needs about 1MB of memory.
> · dbcache: specified as nsslapd-dbcachesize.
> · All entry caches: specified as nsslapd-cachememsize.


Gerald Richter wrote:
> Hi,
>
> I just made a test installation of FDS and saw that a ns-slapd without any 
> user data takes about 120MB of (virtual) memory on my system.
>
> I would like to run it on a system which limited memory resources, so I am 
> looking for a way to use less memory.
>
> I don't have high load on that system and never more than one or two quries in 
> parallel, so it would be quite ok to reduce the number of threads and things 
> like this, but beside reducing the cache size of the backend DB I didn't find 
> any hints what can be done in this direction.
>
> Any ideas?
>
> Thanks
>
> Gerald
>
>  
>
>  
> ** Virus checked by BB-5000 Mailfilter ** 
>
> --
> Fedora-directory-users mailing list
> Fedora-directory-users at redhat.com
> https://www.redhat.com/mailman/listinfo/fedora-directory-users
>
>
>