Re: [ZODB-Dev] [Enhancement] Common cache for mounted connections
On Friday 30 September 2005 11:40, Dieter Maurer wrote: We have the need to mount dozens, if not hundreds of ZODBs in a single Zope instance. With the current implementation, each ZODB connection has its own independent cache. This makes it very difficult to use the available memory efficiently for caching. As the caches are independent, a heavily used ZODB cannot use memory assigned to a lightly used ZODB. Each ZODB version also has its own cache. There is already a mechanism for ensuring that lightly used versions do not hold on to memory indefinitely. That should be much easier, and might just be adequate. One big disadvantage is that it does not enforce a strict upper limit on cache/memory usage, so memory usage will grow if all storages are frequently accessed. -- Toby Dickenson ___ For more information about ZODB, see the ZODB Wiki: http://www.zope.org/Wikis/ZODB/ ZODB-Dev mailing list - ZODB-Dev@zope.org http://mail.zope.org/mailman/listinfo/zodb-dev
Re: [ZODB-Dev] [Enhancement] Common cache for mounted connections
Toby Dickenson wrote at 2005-9-30 16:40 +0100: On Friday 30 September 2005 11:40, Dieter Maurer wrote: We have the need to mount dozens, if not hundreds of ZODBs in a single Zope instance. With the current implementation, each ZODB connection has its own independent cache. This makes it very difficult to use the available memory efficiently for caching. As the caches are independent, a heavily used ZODB cannot use memory assigned to a lightly used ZODB. Each ZODB version also has its own cache. There is already a mechanism for ensuring that lightly used versions do not hold on to memory indefinitely. That should be much easier, and might just be adequate. Thank you! But I fear some of dozens (or even hundreds) of storages will not be lightly used. -- Dieter ___ For more information about ZODB, see the ZODB Wiki: http://www.zope.org/Wikis/ZODB/ ZODB-Dev mailing list - ZODB-Dev@zope.org http://mail.zope.org/mailman/listinfo/zodb-dev
