Hi,
it could be flushing of logs (access.log) on disk which happens more often when server
load is higher. you could use iostat or dstat to see what happens
Regards,
Andrey
De: "Ghiurea, Isabella"
<Isabella.Ghiurea(a)nrc-cnrc.gc.ca>
À: 389-users(a)lists.fedoraproject.org
Envoyé: Mercredi 5 Septembre 2018 23:14:24
Objet: [389-users] ldap perfomance
Hello Gurus,
looking for an answer to the following performance behavior
my env: 389-ds-base-1.3.5.15-1.fc24.x86_64 in multimaster fractional replication
running rsearch for 5 min with 1 thread seeing spikes for a basic
read using
index uid
And running with 10 threads same search the avg ms/ops performance
are much
better with no major spike/burst
Any explanation much appreciate it
see bellow for 1 thread and the spike/burst
T 300 -t 1
rsearch: 1 threads launched.
T1 min= 0ms, max= 5ms, count = 54710
T1 min= 0ms, max= 42ms, count = 64930
T1 min= 0ms, max= 2ms, count = 65174
T1 min= 0ms, max= 2ms, count = 65110
T1 min= 0ms, max= 44ms, count = 64966
T1 min= 0ms, max= 1ms, count = 65101
T1 min= 0ms, max= 22ms, count = 65056
T1 min= 0ms, max= 32ms, count = 64981
T1 min= 0ms, max= 1ms, count = 65145
T1 min= 0ms, max= 1ms, count = 65223
T1 min= 0ms, max= 27ms, count = 65015
T1 min= 0ms, max= 1ms, count = 65182
T1 min= 0ms, max= 3ms, count = 65213
T1 min= 0ms, max= 23ms, count = 64760
T1 min= 0ms, max= 2ms, count = 64214
T1 min= 0ms, max= 3ms, count = 52279
T1 min= 0ms, max= 11ms, count = 64914
T1 min= 0ms, max= 1ms, count = 65118
T1 min= 0ms, max= 5ms, count = 64852
T1 min= 0ms, max= 91ms, count = 64180
T1 min= 0ms, max= 4ms, count = 64746
T1 min= 0ms, max= 1ms, count = 65080
T1 min= 0ms, max= 12ms, count = 65110
T1 min= 0ms, max= 702ms, count = 59243
T1 min= 0ms, max= 1ms, count = 65082
T1 min= 0ms, max= 89ms, count = 64331
T1 min= 0ms, max= 23ms, count = 64647
T1 min= 0ms, max= 5ms, count = 64818
T1 min= 0ms, max= 55ms, count = 64374
T1 min= 0ms, max= 8ms, count = 64713
T1 min= 0ms, max= 8ms, count = 64713
300 sec >= 300
Final Average rate: 6394.22/sec = 0.1564msec/op, total: 64713
And final avg rate for 10 threads, no significant spike/burst for
this num of
threads
20180905 14:07:23 - Rate: 16962.10/thr (16962.10/sec = 0.0590ms/op),
total:169621 (10 thr)
300 sec >= 300
Final Average rate: 17420.40/sec = 0.0574msec/op, total:169621
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