On Thu, Apr 10, 2014 at 07:40:44PM -0700, daiguochao wrote: > Dear Stan, I can't send email to you.So I leave a message here.I hope not to > bother you. > Thank you for your kind assistance. > > In accordance with your suggestion, we executed "echo 3 > > /proc/sysm/drop_caches" for trying to release vfs dentries and inodes. > Really, > our lost memory came back. But we learned that the memory of vfs dentries > and inodes is distributed from slab. Please check our system "Slab: 509708 > kB" from /proc/meminfo, and it seems only be took up 500MB and xfs_buf take > up 450MB among. That's where your memory is - in metadata buffers. The xfs_buf slab entries are just the handles - the metadata pages in the buffers usually take much more space and it's not accounted to the slab cache nor the page cache. Can you post the output of /proc/slabinfo, and what is the output of xfs_info on the filesystem in question? Also, a description of your workload that is resulting in large amounts of cached metadata buffers but no inodes or dentries would be helpful. Cheers, Dave. -- Dave Chinner david@xxxxxxxxxxxxx _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
