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Re: slow overall perfomance
Posted by: N N
Date: May 23, 2011 03:07AM

Thanks - Rick


>The slowlog threshold is long_query_time, which defaults to a too-high value. Set that to 1 (second).

yes, I have slowlog threshold set to 1 sec but I do not see any slow query, also I did enabled log_queries_not_using_indexes option but did not find any slow query

>Well, let's double check some other things...
>How much RAM in each machine?

$ free mem
total used free shared buffers cached
Mem: 8174188 8120604 53584 0 196452 6592500
-/+ buffers/cache: 1331652 6842536
Swap: 10217332 140 10217192


>How many CPUs? cores?
4

>Is hyperthreading on or off?
yes it is enabled

>What were your tests like? Real-life? Or Benchmarks?
real-life test

>What was the CPU usage (or "load average") during the tests?
with 5.0 the load average is high i.e. load average: 13.24, 8.46, 4.49 but the test finished in 10min.
However, the same test run with 5.1 the load average: 3.13, 1.56, 0.93 and the test took at least 20 min to finish

>sync_binlog? Or was the binlog turned off?
sync_binlog was off and binlog was ON

>Which version of the Plugin did you use?
1.0.15

>How much disk activity?
disk avtiviy is not high, the vmstat collected during test run on 5.1

vmstat 5
procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu------
r b swpd free buff cache si so bi bo in cs us sy id wa st
1 0 140 46052 197984 6675892 0 0 0 9 1 2 0 1 99 0 0
4 0 140 46132 197992 6675276 0 0 44 995 1172 12477 51 9 40 0 0
2 0 140 48516 197992 6668768 0 0 38 990 1151 10997 48 8 43 0 0
8 0 140 45212 197976 6658164 0 0 41 1008 1179 11695 52 9 39 0 0
3 0 140 51900 197980 6647436 0 0 42 1110 1211 11932 51 9 39 0 0
4 1 140 47676 197980 6646192 0 0 42 849 1156 11874 50 8 42 0 0
3 0 140 46484 197980 6644732 0 0 42 1011 1155 11793 51 9 40 0 0
5 0 140 45668 197980 6640496 0 0 38 936 1169 11340 49 9 42 0 0
5 0 140 47200 197984 6628168 0 0 30 803 1125 7282 76 7 17 0 0
3 0 140 47072 197988 6629940 0 0 41 846 1158 11377 54 9 37 0 0
5 0 140 45704 197984 6628752 0 0 42 1025 1158 11944 51 9 40 0 0
3 0 140 46172 197988 6627376 0 0 42 851 1158 11812 51 9 41 0 0
3 0 140 46936 197988 6626832 0 0 43 1039 1160 12124 48 9 43 0 0


The vmstat collected durning test run on 5.0

vmstat 5
procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu------
r b swpd free buff cache si so bi bo in cs us sy id wa st
10 1 140 48024 197088 6492620 0 0 0 9 1 0 0 1 99 0 0
13 1 140 46472 197088 6493092 0 0 318 998 1171 7849 82 14 4 0 0
12 1 140 46276 197092 6492660 0 0 316 1147 1185 8276 82 14 4 0 0
14 1 140 45640 197100 6487168 0 0 76 1010 1167 8159 79 15 6 0 0
13 1 140 49252 197096 6482576 0 0 79 1088 1173 8382 81 14 4 0 0
15 0 140 47156 197096 6485360 0 0 92 1030 1170 8458 81 15 4 0 0
15 0 140 49356 197060 6475312 0 0 269 1110 1180 8427 81 14 4 0 0
17 0 140 56912 197060 6465216 0 0 323 1031 1178 8343 82 14 4 0 0
15 0 140 50044 197064 6468176 0 0 92 1102 1180 8338 82 14 4 0 0



Edited 6 time(s). Last edit at 05/23/2011 09:34AM by N N.

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May 20, 2011 03:53AM
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Re: slow overall perfomance
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