Hi Devs,
I run memaslap to understand the performance characteristics of memcached,
My setup : both memcached and memaslap running on a single machine with
NUMA. memcached is bound to NUMA 1. Gave 3GB of memory to memcached.
workload : get/set 0.5/0.5
I increase number of thread from memaslap and observe throughput latency
numbers.
I see increase in throughput (expected) but latency drops as I crease the
load.
The initial average latency is 83 us and it drops to 30us with number of
threads = 8, this is an unexpected number.-- I expected the latency to go
up.
Am I reading the output wrong?
Apologies, if this question does not qualify for this mailing list. If so,
please direct me to correct list I can get help. :)
--Pradeep
Thread count = 1
Total Statistics (11447336 events)
Min: 11
Max: 1663
Avg: 83
Geo: 79.83
Std: 36.39
Log2 Dist:
4: 42 594 351733 9527982
8: 1551101 7451 7103 1330
cmd_get: 5723671
cmd_set: 5723681
get_misses: 0
written_bytes: 394933167
read_bytes: 343419948
object_bytes: 183157792
Run time: 60.0s Ops: 11447352 TPS: 190765 Net_rate: 11.7M/s
Thread count = 2
Total Statistics (30888799 events)
Min: 12
Max: 2011
Avg: 30
Geo: 29.68
Std: 15.32
Log2 Dist:
4: 170225 25862674 4766668 66398
8: 154 5017 17493 170
cmd_get: 15444404
cmd_set: 15444411
get_misses: 0
written_bytes: 1065663678
read_bytes: 926663772
object_bytes: 494221152
Run time: 60.0s Ops: 30888815 TPS: 514751 Net_rate: 31.7M/s
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