Am 07.11.09 18:25, schrieb Hanno Schlichting:
>  Hi.
> 
>  I've been playing around with the new "cache-size-bytes" setting to
>  limit the ZODB cache sizes.
> 
>  My ZODB 3.9.3 (Zope 2.12 / Plone) config had a setting of
>  cache-size-bytes to 128mb and a cache-size of one million (to
>  effectively disable the object number based checks). This was without
>  ZEO, a simple FileStorage with a blobstorage enabled.
> 
>  When using and testing this for a while in a setup with two database
>  connection threads, things worked fine for a while, but after 10 to 15
>  minutes of various load patterns things broke down. Both connections
>  started to minimize their connection cache down to zero objects
>  continuously.
> 
>  It looks like the active cache size isn't properly reduced at some
>  point and as a result the cache thinks it is already using the maximum
>  amount.
> 
>  Has anyone used the bytes limited cache in production yet and has any
>  experience with it?
> 
>  I can try to isolate the problem some more. Playing around I did
>  everything from loading objects, packing the database, minimizing
>  caches, so it's hard to know what might cause this.

I would assume that this feature is working since it comes
from the Haufe Zope fork afaik and likely we are using it in production.
But I have to check this by digging through the legacy of the
origin author.

Andreas