Hello,
I’ve recently upgraded one of the nginx servers within a caching
(proxy_cache module) cluster from 1.8.1 to 1.10 and soon after I noticed
unusually high number of various errors only on that server which I
eventually pin pointed to a mismatch between the actual cached file size
on
disk and size reported in file metadata (either content-length or
something
else). Apparently, cached files on 1.10 are cut short and miss up to few
hundred kilobytes at their ends (for files over 100 MB in total size).
For a
few files I checked, the larger file was, more content it missed at the
end.
Eventually I found the culprit to be aio_write which I enabled the same
time
I upgraded nginx. Disabling it and removing all already cached files
resolved the problem.
Relevant directives:
thread_pool default threads=4 max_queue=65536;
sendfile on;
aio threads=default;
aio_write on;
# output_buffers are used if sendfile is not used
# output_buffers 8 512k;
read_ahead 1;
proxy_cache_path /cache ... use_temp_path=on;
proxy_buffering on;
proxy_buffers 32 64k;
proxy_busy_buffers_size 128k;
proxy_temp_file_write_size 128k;
OS is Linux 4.1.
Thanks,
Vedran
Posted at Nginx Forum: