[PATCH 07/18] vinyl: tune dump bandwidth histogram buckets

[Konstantin Osipov]

* Vladimir Davydov <vdavydov.dev at gmail.com> [18/08/16 23:03]:
> Typically, dump bandwidth varies from 10 MB to 100 MB per second so
> let's use 5 MB bucket granularity in this range. Values less than
> 10 MB/s can also be observed, because the user can limit disk rate
> with box.cfg.snap_io_rate_limit so use 1 MB granularity between 1 MB
> and 10 MB and 100 KB granularity between 100 KB and 1 MB. A write rate
> greater than 100 MB/s is unlikely in practice, even on very fast disks,
> since dump bandwidth is also limited by CPU, so use 100 MB granularity
> there.

I like the idea and I assume you know what you're doing (aka you
measured the positive impact of the new histogram), so ok to push.

-- 
Konstantin Osipov, Moscow, Russia, +7 903 626 22 32
http://tarantool.io - www.twitter.com/kostja_osipov