Not so good latency during the test, or? Here is my ioping (cool never heard of that one, nice tool).
w/o ab --- /tmp/ (hfs /dev/disk0s2) ioping statistics --- 11 requests completed in 10.2 s, 32.1 k iops, 125.3 mb/s min/avg/max/mdev = 21 us / 31 us / 50 us / 7 us w ab 29 requests completed in 29.0 s, 33.1 k iops, 129.3 mb/s min/avg/max/mdev = 20 us / 30 us / 109 us / 17 us Am 17.01.2014 um 00:54 schrieb Bill Scheidel <b...@bunkat.com>: > And this is ioping without the ab test running: > > 31 requests completed in 30.5 s, 3.2 k iops, 12.5 mb/s > min/avg/max/mdev = 190 us / 312 us / 477 us / 63 us > > On Thursday, January 16, 2014 3:51:32 PM UTC-8, Bill Scheidel wrote: > I ran vmstat while running the ab test: > > procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu---- > r b swpd free buff cache si so bi bo in cs us sy id wa > 0 1 0 2429284 161572 2133284 0 0 22 75 98 354 9 8 80 > 2 > > I also ran ioping to check disk latency while the ab test was running: > > 190 requests completed in 3.3 min, 37 iops, 151.9 kb/s > min/avg/max/mdev = 192 us / 26.3 ms / 178.1 ms / 26.5 ms > > Results from the ab run: > > Percentage of the requests served within a certain time (ms) > 50% 150 > 66% 158 > 75% 166 > 80% 168 > 90% 209 > 95% 276 > 98% 300 > 99% 324 > 100% 366 (longest request) > > > > On Thursday, January 16, 2014 3:33:55 PM UTC-8, Michael Hunger wrote: > Let's continue this discussion here. > > To collect the other information so far: > http://stackoverflow.com/questions/21145723/neo4j-2-0-0-poor-performance-for-dev-test-in-a-virtual-machine > The GH issue you raised with Wes' and my answers: > https://github.com/neo4j/neo4j/issues/1829 > > My "ab" tests: https://gist.github.com/jexp/8452037 > Wes' numbers: https://github.com/neo4j/neo4j/issues/1829#issuecomment-32564561 > > Your messages.log looks good to me. > > So it might be related to disk performance, could you run vmstat or similar > while running the ab test? > > I think it is related to the forced fsync at commit which can be hit by a > higher disk latency? > > Michael > > -- > You received this message because you are subscribed to the Google Groups > "Neo4j" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to neo4j+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/groups/opt_out. -- You received this message because you are subscribed to the Google Groups "Neo4j" group. To unsubscribe from this group and stop receiving emails from it, send an email to neo4j+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
