problem with cache size

Anatoli Marinov a.marinov at
Fri Mar 1 15:41:18 UTC 2013

I have a strange problem with cache size on XFS. I tried to debug it and I
found something.

First there is a test request for 1 file which is 10 MB.
In the function ngx_http_file_cache_update I have counted size 17039360
because st_blocks = 33280,  st_size = 10486040.

After that I am trying to restart the server and cache manager add this
size for cache structure but the size is different as follow
for cache size the increment is with 10489856,  st_size = 10486040,
st_blocks = 20488

As could be seen st_blocks is different for one and the same file.
I think the second file size is right but why the first is wrong?

Thanks in advance

Anatoli Marinov
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