[Zope] Reducing Zope Memory Usage

[Toby Dickenson]

On Friday 07 February 2003 1:48 am, george donnelly wrote:

> Try these options:
>
> 1. pack the ZODB regularly (lessens your undo options)

That wont significantly reduce memory usage unless you havent packed for a 
very long time. The 'Cache Parameters' page has a 'Total number of objects in 
the database' field. Under filestorage you can expect to reclaim a few tens 
of bytes for each object romoved from this total by packing.

> 2. minimize the cache regularly (may use slightly more proc time)

In 2.6 the cache management is most efficient if you let it manage itself, by 
setting a realistic target size.

> 3. restart zope regularly (occasional brief (60-120 seconds) downtime as
> Zope and ZEO restart)

Yes, If you have a memoy leak

> 4. keep as many images and files out of the ZODB as possible (some
> inconvenience)

If this makes a significant difference then there is a bug. File and Image 
classes have optimisations because they expect to deal with large things. You 
will see a memory impact of other large (multi-megabyte) responese, such as 
from a DTML method

6. If you mave many concurrent users then use a front end proxy.

7. Set a smaller cache target size

8. Use fewer (2) threads. Memory usage is proportional to thread count.

9. Fix your memory leak.

-- 
Toby Dickenson
http://www.geminidataloggers.com/people/tdickenson