I had an befalling to analysis altered Samsung accumulator accessories beneath tpcc-mysql criterion powered by Percona Server 5.7. You can acquisition a arbitrary with capacity here.
I accept in my possession:
I am activity to use 1000 warehouses in the tpcc-mysql benchmarks, which corresponds about to a abstracts admeasurement of 100GB.
This criterion varies the innodb_buffer_pool_size from 5GB to 115GB. With 5GB absorber basin admeasurement alone a actual baby allocation of abstracts fits into memory, which after-effects in accelerated beginning IO reads and accelerated accomplishments IO writes. With 115GB about all abstracts fits into memory, which after-effects in actual baby (or about zero) IO reads and abstinent accomplishments IO writes.
All absorber basin sizes in the average of the breach accord to consistent IO reads and writes. For example, we can see the apprehend to address arrangement on the blueprint beneath (received for the PM1725 device) with altered absorber basin sizes:
We can see that for the 5GB absorber basin admeasurement we accept 56000 apprehend IOPs operations and 32000 address IOPs. For 115GB, the reads are basal at about 300 IOPS and the accomplishments writes are at the 20000 IOPs level. Reads gradually abatement with the accretion absorber basin size.
The archive are generated with the Percona Monitoring and Management tools.
Let’s analysis the results. The aboriginal blueprint shows abstracts taken every one second, acceptance us to see the trends and stalls.
If we booty averages, the after-effects are:
In table anatomy (the after-effects are in new adjustment affairs per minute (NOTPM)):
The Samsung 850 acutely can’t accumulate with the added avant-garde SM863 and PM1725. The PM1725 shows a greater account with abate absorber basin sizes. In cases application ample amounts of memory, there is about no aberration with SM863. The acumen is that with big absorber basin sizes, MySQL does not advance IO subsystem abundant to use all the PM1725 performance.
For the reference, my.cnf book is:
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