Tuning advice
Shaffer, Kurt
Kurt_Shaffer at steris.com
Wed Mar 5 16:23:19 UTC 2008
Hello,
We are looking for some tuning recommendations for the following
environment. I am not very familiar with Java so I am seeking any help.
> 4 cpus (Ultra Sparc III 900MHz) / 8GB memory
>
>
>
> java version "1.4.2_13"
>
> Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_13-b06)
>
> Java HotSpot(TM) Client VM (build 1.4.2_13-b06, mixed mode)
>
>
>
> <Property name="wt.manager.cmd.MethodServer.java.command"
> overridable="true" value="$(wt.java.cmd.quoted) -server -classpath
> $(wt.java.clas
>
> spath.quoted) -Djava.protocol.handler.pkgs\=HTTPClient
> -DHTTPClient.disableKeepAlives\=true
> -DHTTPClient.dontChunkRequests\=true -Xss2M -Xms51
>
> 2m -Xmx1024m -noverify -verbose:gc -XX:+UseParallelGC
> -XX:ParallelGCThreads=20 -XX:+PrintGCTimeStamps -XX:+PrintGCDetails
> -Xloggc:$(wt.logs.di
>
> r)$(dir.sep)ms_gc.log wt.method.MethodServerMain"/>
>
>
>
> Application is PTC Windchill
>
>
>
> We have seen very slow response times from the users standpoint, when
> they login it takes up to 15 seconds to render the display, when they
> are navigating through different views in their browser it can take 40
> seconds or longer to display pages.
>
63153.891: [GC 314184K->242537K(470016K), 0.5394510 secs]
63154.431: [Full GC 242537K->222908K(470464K), 4.3961010 secs]
63218.867: [GC 237602K->265484K(470464K), 0.4835425 secs]
63219.351: [Full GC 265484K->219722K(468800K), 4.0777246 secs]
63229.962: [GC 283466K->275130K(470016K), 0.9633742 secs]
63246.178: [GC 296442K->232743K(470016K), 0.2712703 secs]
63250.526: [GC 298919K->284345K(474432K), 0.6691910 secs]
63253.376: [GC 307833K->234235K(474432K), 0.7393747 secs]
63259.981: [GC 309243K->288777K(475584K), 0.7275010 secs]
63262.366: [GC 324297K->243675K(475584K), 0.5750282 secs]
63267.115: [GC 320987K->275409K(475712K), 1.0370391 secs]
63270.833: [GC 331025K->248161K(475712K), 0.8789762 secs]
63274.475: [GC 325729K->263489K(500032K), 1.6077160 secs]
63280.994: [GC 341057K->263713K(500032K), 0.9178316 secs]
63283.436: [GC 280071K->256830K(534464K), 0.6641916 secs]
63284.101: [Full GC 256830K->214330K(542528K), 4.6351180 secs]
63305.164: [GC 349882K->281490K(542528K), 0.6127869 secs]
63316.432: [GC 376658K->251450K(539136K), 1.0353315 secs]
63348.746: [GC 309133K->310170K(539136K), 0.3874349 secs]
63349.134: [Full GC 310170K->194499K(470208K), 4.9789538 secs]
63370.780: [GC 261059K->241509K(470784K), 0.4214626 secs]
63374.528: [GC 276453K->215817K(470784K), 0.8574863 secs]
63381.942: [GC 283529K->246533K(474816K), 0.6949210 secs]
63389.788: [GC 285893K->216402K(474816K), 1.3839849 secs]
63414.126: [GC 237126K->244639K(477696K), 0.6417762 secs]
63414.768: [Full GC 244639K->212594K(477696K), 4.6969125 secs]
63437.799: [GC 294130K->269346K(477760K), 0.5160500 secs]
63441.657: [GC 306082K->225578K(477760K), 0.3883250 secs]
63454.008: [GC 307242K->279893K(480256K), 0.4979514 secs]
63458.126: [GC 314261K->232665K(480256K), 0.5394576 secs]
63470.586: [GC 319321K->283449K(484096K), 0.6432362 secs]
63473.498: [GC 320953K->237395K(484096K), 0.2825034 secs]
63479.613: [GC 299104K->294563K(484096K), 0.5962983 secs]
63480.210: [Full GC 294563K->220268K(483584K), 5.8936777 secs]
63524.720: [GC 313580K->295967K(483904K), 0.7195508 secs]
PrintGCStats output
what count total mean max stddev
gen0(s) 1282 776.553 0.60574 3.605 0.3765
gen1t(s) 823 1643.837 1.99737 11.139 1.0934
GC(s) 2105 2420.391 1.14983 11.139 1.0074
alloc(MB) 1282 -84202.223 -65.68036 169.752 101.4710
promo(MB) 1230 -86070.940 -69.97637 333.249 103.2167
alloc/elapsed_time = -84202.223 MB / 56876.807 s = -1.480 MB/s
alloc/tot_cpu_time = -84202.223 MB / 227507.228 s = -0.370 MB/s
alloc/mut_cpu_time = -84202.223 MB / 217825.665 s = -0.387 MB/s
promo/elapsed_time = -86070.940 MB / 56876.807 s = -1.513 MB/s
promo/gc0_time = -86070.940 MB / 0.000 s = 0.000 MB/s
gc_seq_load = 9681.563 s / 227507.228 s = 4.255%
gc_conc_load = 0.000 s / 227507.228 s = 0.000%
gc_tot_load = 9681.563 s / 227507.228 s = 4.255%
>
> Thankx
Kurt Shaffer
UNIX Architect
IT Enterprise Operations
STERIS Corporation <http://www.steris.com>
440-392-7089
Internal Sites
* UNIX Operations
<http://bis.steris.com/sites/EnterpriseOps/UNIX/default.aspx>
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* STERIS Java Instant Messanger <http://crystal.steris.com/im>
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