[OpenAFS] Re: accessing R/O volume becomes slow
Thu, 27 Nov 2014 13:11:25 +0100
> On 27 Nov 2014, at 11:26, Hans-Werner Paulsen =
> On 11/26/2014 09:15 PM, Andrew Deason wrote:
>> On Wed, 26 Nov 2014 10:51:00 +0100
>> Hans-Werner Paulsen <hans@MPA-Garching.MPG.DE> wrote:
>>> Checking the machine I see more than 5 million of afs_inode_cache =
>>> entries. Is this normal? Any hint how to proceed?
>> That's not unusual if you are accessing a lot of files (say, about 5
>> million recently accessed). But having a lot of vcaches in memory can
>> cause certain operations to be slow; there was a fix just added in
>> 1.6.10 to improve speed for a background cleanup process with lots of
>> files (well, and PAGs): 94f1d4.
> Yesterday, on another machine I created and deleted 4 million files on =
AFS. The number of afs_inode_cache slabs grew from 1 million to 5 =
million. Today there are still 5 million entries.
It should shrink when there's memory pressure. If you're still worried, =
there's the -disable-dynamic-vcaches switch for afsd.