Odd cache behavior
is at rambler-co.ru
Sat Oct 3 13:22:59 MSD 2009
On Fri, Oct 02, 2009 at 01:07:24PM -0400, Jim Ohlstein wrote:
> I'm seeing odd disk usage statistics for my cache. The cache is
> 128GB SSD using ext2 file system mounted with "noatime" option. The
> cache is all that the the drive is being used for at this time.
> The attached graphs were generated by Munin using df. The data from du
> correlates closely with df when run manually.
> As you can see, periodically, with no set interval, disk usage rises
> gradually, and then drops precipitously. I don't see anything out of the
> ordinary in the error log. The cache serves about 2.8-3 million requests
> per day, up from ~2.2-2.4 million one month ago.
> The cache config is:
> fastcgi_cache_path /falcon/cache levels=1:2 keys_zone=one:1024m
> inactive=1d max_size=80g;
> where the SSD is mounted as /falcon.
As I understand /falcon is used solely for nginx cache ?
Could you monitor inode usage also ?
Did you restart nginx in the times of the drops or not ?
Currently I have no idea why it may be.
More information about the nginx