[Bugs] [Bug 1673058] Network throughput usage increased x5

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1673058



--- Comment #7 from Hubert <revirii at googlemail.com> ---
i set performance.readdir-ahead to off and watched network traffic for about 2
hours now, but traffic is still as high. 5-8 times higher than it was with old
4.1.x volumes.

just curious: i see hundreds of thousands of these messages:

[2019-03-05 12:02:38.423299] W [dict.c:761:dict_ref]
(-->/usr/lib/x86_64-linux-gnu/glusterfs/5.3/xlator/performance/quick-read.so(+0x6df4)
[0x7f0db452edf4]
-->/usr/lib/x86_64-linux-gnu/glusterfs/5.3/xlator/performance/io-cache.so(+0xa39d)
[0x7f0db474039d] -->/usr/lib/x86_64-linux-gnu/libglusterfs.so.0(dict_ref+0x58)
[0x7f0dbb7e4a38] ) 5-dict: dict is NULL [Invalid argument]

see https://bugzilla.redhat.com/show_bug.cgi?id=1674225 - could this be
related?

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