So recently we have moved our systems from 1.8 to 2.5 clients and have lost of the
performance we had from before which is expected. So I thought we could try using
4MB RPCs instead of the default 1MB RPC packet. I set max_pages_per_rpc to 1024
and looked at the value of max_dirty_mb which was 32 and max_rpcs_in_flight which
is 8. By default a dirty cache of 32MB should be enough in this case. So It tested it and
saw no performance improvements. After that I boosted max_dirty_mb to 64 and still
no improvements over the default settings. Has anyone seen this before? What could
I be missing?