Hello, For desktop use, and presumably rapidly changing non-desktop uses, I find the ARC cache pretty annoying in its behavior. For example this morning I had to hit my launch-terminal key perhaps 50 times (roughly) before it would start completing without disk I/O. There are plenty of other examples as well, such as /var/db/pkg not being pulled aggressively into cache such that pkg_* operations (this is on FreeBSD) are slower than they should (I have to run "pkg_info" some number of times before *it* will complete without disk I/O too).
I would be perfectly happy with pure LRU caching behavior or an approximation thereof, and would therefore like to essentially completely turn off all MFU-like weighting. I have not investigated in great depth so it's possible this represents an implementation problem rather than the actual intended policy of the ARC. If the former, can someone confirm/deny? If the latter, is there some way to tweak it? I have not found one (other than changing the code). Is there any particular reason why such knobs are not exposed? Am I missing something? -- / Peter Schuller _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
