Re: [Moosefs-users] fox and bird

[Dr. M. J. C. <mj...@av...>]

On 05/10/2012 05:28 PM, Steve Thompson wrote:
> On Thu, 29 Mar 2012, Steve Thompson wrote:
>
>> I have further found that Thunderbird works well, but Firefox is so
>> painfully slow (glacial) as to be unusable. For the time being, I have had
>> to relocate the .mozilla directories to a non-MFS file system and replaced
>> them by symbolic links.
...
> Copying a large file into MFS gets me something like 80-85 MB/sec
> (physically twice that with goal=2) so I am at a loss to explain the
> dismal performance with firefox. I could really use some ideas, as I have
> no idea where to go next.

I would focus on the sqlite files that firefox uses. sqlite is notorious 
for causing problems on remote filesystems (particularly NFS). 
"urlclassifier3.sqlite" in particular grows to be very large (~64 MB).

Are the fsync times reported by mfs.cgi (under "disks") OK? Some apps 
call fsync much more frequently than others.

- Mike