Was wondering if anyone can see any issues with the ARC in the following output? bash-3.00# ./arc_summary.pl System Memory: Physical RAM: 6023 MB Free Memory : 784 MB LotsFree: 90 MB ZFS Tunables (/etc/system): ARC Size: Current Size: 1159 MB (arcsize) Target Size (Adaptive): 2106 MB (c) Min Size (Hard Limit): 624 MB (zfs_arc_min) Max Size (Hard Limit): 4999 MB (zfs_arc_max) ARC Size Breakdown: Most Recently Used Cache Size: 49% 1034 MB (p) Most Frequently Used Cache Size: 50% 1072 MB (c-p) ARC Efficency: Cache Access Total: 59966414 Cache Hit Ratio: 99% 59929362 [Defined State for buffer] Cache Miss Ratio: 0% 37052 [Undefined State for Buffer] REAL Hit Ratio: 97% 58728625 [MRU/MFU Hits Only] Data Demand Efficiency: 99% Data Prefetch Efficiency: 40% CACHE HITS BY CACHE LIST: Anon: 2% 1198857 [ New Customer, First Cache Hit ] Most Recently Used: 2% 1435141 (mru) [ Return Customer ] Most Frequently Used: 95% 57293484 (mfu) [ Frequent Customer ] Most Recently Used Ghost: 0% 201 (mru_ghost) [ Return Customer Evicted, Now Back ] Most Frequently Used Ghost: 0% 1679 (mfu_ghost) [ Frequent Customer Evicted, Now Back ] CACHE HITS BY DATA TYPE: Demand Data: 91% 54885238 Prefetch Data: 0% 15730 Demand Metadata: 6% 3820665 Prefetch Metadata: 2% 1207729 CACHE MISSES BY DATA TYPE: Demand Data: 15% 5618 Prefetch Data: 63% 23581 Demand Metadata: 7% 2701 Prefetch Metadata: 13% 5152 --------------------------------------------- -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mail.opensolaris.org/pipermail/zfs-discuss/attachments/20100321/0a69f639/attachment.html>
On Sun, 21 Mar 2010, Tony MacDoodle wrote:> Was wondering if anyone can see any issues with the ARC in the following output?Do you expect us to see something wrong? Based on the cache hit ratio (99%), it seems to be working exceedingly well. Bob -- Bob Friesenhahn bfriesen at simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/