>>>>I run database backups to an ext3 filesystem, using both >>>rman and regular hotbackups on different servers. Linux uses >>>all available ram to cache the writes to ext3, which can If this is RMAN, why isn't oracle using O_DIRECT for the ext3 target? 10gR2 will do open(,O_DIRECT,) on ext3 if you set filesystemio_options=directIO. I would recommend doing that, but then I'd also recommend a filesystem where you can put any thing you please in there - without the worry of landmines to step on...none of this "Uh, I think I'll put some goodies in ocfs filesystem, but then I have to put these other goodies in ext3 so my system doesn't blow up" Kevin Closson Chief Architect, Database Solutions PolyServe www.polyserve.com >>>reduce free memory to 10-20MB (the box has 12GB) - this is >>>how it is supposed to work. Sometimes the kernel is unable >>>to allocate ram for new processes when it drop to this level >>>and causes errors. It seems to me that filesystem block >>>caching is unsuitable for a database server - it is not an >>>issue for OCFS, only for backups to ext3. >>>> >>>>[...] >>>>-- >>>> >>>> >>> >>>-- >>>//www.freelists.org/webpage/oracle-l >>> >>> >>> -- //www.freelists.org/webpage/oracle-l