On Monday, September 17, 2012 8:35:22 AM UTC-7, Howard Chu wrote:
>
> For anyone interested, there's now a port of memcacheDB using OpenLDAP's
> MDB (memory-mapped database) available on
> https://gitorious.org/mdb/memcachedb in the branch "mine" (the master
> branch is just an import of the original memcachedb code from SVN).
>
> Is memcachetest actually reliable? It seems to be returning odd results
for "max".
BDB 4.7
hyc@ada:/home/software/memcachetest$ ./memcachetest -c 100000
Average with 1 threads
Get operations:
#of ops. min max avg max90th max95th max99th
66916 50 us 37 ms 92 us 109 us 112 us 119 us
Set operations:
#of ops. min max avg max90th max95th max99th
33084 71 us 229 ms 247 us 176 us 182 us 198 us
Usr: 0.496031
Sys: 3.536221
Tot: 17.175638
Server time:
Usr: 5.632352
Sys: 3.968248
Total gets: 0
Total sets: 10000
hyc@ada:/home/software/memcachetest$ ./memcachetest -c 100000 -t 4
Average with 4 threads
Get operations:
#of ops. min max avg max90th max95th max99th
67097 56 us 442 us 102 us 130 us 139 us 160 us
Set operations:
#of ops. min max avg max90th max95th max99th
32903 84 us 336 ms 655 us 316 us 351 us 437 us
Usr: 0.924057
Sys: 3.684230
Tot: 8.662194
Server time:
Usr: 6.292393
Sys: 4.076255
Total gets: 0
Total sets: 10000
MDB
hyc@ada:/home/software/memcachetest$ ./memcachetest -c 100000
Average with 1 threads
Get operations:
#of ops. min max avg max90th max95th max99th
66916 39 us 392 us 58 us 65 us 67 us 74 us
Set operations:
#of ops. min max avg max90th max95th max99th
33084 55 us 396 us 77 us 87 us 90 us 100 us
Usr: 0.648040
Sys: 3.496218
Tot: 7.489147
Server time:
Usr: 1.420089
Sys: 3.004187
Total gets: 0
Total sets: 10000
hyc@ada:/home/software/memcachetest$ ./memcachetest -c 100000 -t 4
Average with 4 threads
Get operations:
#of ops. min max avg max90th max95th max99th
67143 41 us 392 us 64 us 75 us 80 us 89 us
Set operations:
#of ops. min max avg max90th max95th max99th
32857 70 us 517 us 127 us 176 us 193 us 230 us
Usr: 0.872054
Sys: 3.708231
Tot: 3.18446744073709520189
Server time:
Usr: 2.644165
Sys: 3.224201
Total gets: 0
Total sets: 10000
memcached 1.2.0
hyc@ada:/home/software/memcachetest$ ./memcachetest -c 100000
Average with 1 threads
Get operations:
#of ops. min max avg max90th max95th max99th
66916 37 us 376 us 56 us 63 us 65 us 71 us
Set operations:
#of ops. min max avg max90th max95th max99th
33084 45 us 369 us 59 us 65 us 66 us 69 us
Usr: 0.568035
Sys: 3.500218
Tot: 7.18446744073709103524
Server time:
Usr: 0.888055
Sys: 2.832177
Total gets: 0
Total sets: 10000
hyc@ada:/home/software/memcachetest$ ./memcachetest -c 100000 -t 4
Average with 4 threads
Get operations:
#of ops. min max avg max90th max95th max99th
67023 23 us 2411 us 106 us 168 us 178 us 195 us
Set operations:
#of ops. min max avg max90th max95th max99th
32977 24 us 1453 us 104 us 162 us 170 us 184 us
Usr: 0.852053
Sys: 3.280205
Tot: 3.167461
Server time:
Usr: 0.476030
Sys: 2.336146
Total gets: 0
Total sets: 10000
