blocks|key|1412937|text|IBM的GC工具包完全按照您的要求进行操作。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1412938|https://www.ibm.com/developerworks/java/jdk/tools/gcmv/|offset|length|1412939|不过，我不确定它是否与Sun的JVM中的GC日志兼容。|1412940|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|1J|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@$D|Q|E|R|1|S]]|A|$]]|$1|F|3|G|5|6|7|T|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|U|8|@]|9|@]|A|$]]]|I|$J|$5|K|L|M|A|$N|C]]]]

IBM's GC toolkit does exactly what you ask.

<a href="https://www.ibm.com/developerworks/java/jdk/tools/gcmv/" rel="noreferrer">https://www.ibm.com/developerworks/java/jdk/tools/gcmv/</a>

I'm not sure if it's compatible with GC logs from Sun's JVM though.

blocks|key|1412944|text|gcviewer可以做你想做的事情。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1412945|entityMap|0|LINK|mutability|MUTABLE|url|http://www.tagtraum.com/gcviewer.html^0|0|8|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

<a href="http://www.tagtraum.com/gcviewer.html" rel="noreferrer">gcviewer</a> does what you want.

blocks|key|1627796|text|我试过一个在线工具http://gceasy.io，它可以读取我的sun+JDK1.8GC日志。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1627797|entityMap|0|LINK|mutability|MUTABLE|url|http://gceasy.io/^0|9|G|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

I tried a online tool <a href="http://gceasy.io" rel="noreferrer">http://gceasy.io</a> , it can read my sun jdk 1.8 gc log.

blocks|key|1413068|text|我发现用来处理IBM日志和Hotspot+JVM日志并将其可视化的最强大的工具是IBM：https://www.ibm.com/developerworks/mydeveloperworks/groups/service/html/communityview?communityUuid=22d56091-3a7b-4497-b36e-634b51838e11|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1413069|我发现它比IBM+Support+Assistant中的工具更快，并且提供了更多的细节。它正在不断更新，最后是7月12日。|1413070|然而，使用策略CMS解析日志似乎有一些问题，但希望可以解决。|1413071|PrintGCStats也很好，而且提供了很好的统计数据，但随着时间的推移，这还不能用于可视化，这需要一些工作。|1413072|entityMap|0|LINK|mutability|MUTABLE|url|https://www.ibm.com/developerworks/mydeveloperworks/groups/service/html/communityview?communityUuid=22d56091-3a7b-4497-b36e-634b51838e11^0|18|3S|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@$A|S|B|T|1|U]]|C|$]]|$1|D|3|E|5|6|7|V|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|W|8|@]|9|@]|C|$]]|$1|H|3|I|5|6|7|X|8|@]|9|@]|C|$]]|$1|J|3|-4|5|6|7|Y|8|@]|9|@]|C|$]]]|K|$L|$5|M|N|O|C|$P|Q]]]]

The most powerful tool I've found to work with both IBM and Hotspot JVM logs and visualize them is IBM's PMAT:
<a href="https://www.ibm.com/developerworks/mydeveloperworks/groups/service/html/communityview?communityUuid=22d56091-3a7b-4497-b36e-634b51838e11" rel="noreferrer">https://www.ibm.com/developerworks/mydeveloperworks/groups/service/html/communityview?communityUuid=22d56091-3a7b-4497-b36e-634b51838e11</a>

I find it both faster and gives more details than the tool in IBM Support Assistant.
It is being continually updated, lastly July'12.

However seems to have some problems parsing logs with policy CMS but hopefully that can be fixed.

PrintGCStats is pretty good too, and gives good statistics, but not for visualization over time, that needs some work.

blocks|key|1412830|text|我使用的是YourKit+java+profiler，它允许您测量这类事情以及更多，但使用它自己的格式，而不是分析日志。它在Java5下可以做得更多，但在1.4下应该可以工作。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1412831|entityMap|0|LINK|mutability|MUTABLE|url|http://www.yourkit.com/overview/index.jsp^0|5|L|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

I use <a href="http://www.yourkit.com/overview/index.jsp" rel="noreferrer">YourKit java profiler</a>, which lets you measure this sort of thing, and much more, but using it's own format rather than analysing the log. It can do more under Java 5, but should work under 1.4.

blocks|key|1412886|text|试试来自Sun的VisualGC。有JDK+4和5版本，可以让您很好地了解伊甸园、世代和perm空间中发生的事情。你需要添加一个罐子和一个PID，Bob是你的叔叔。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1412887|entityMap|0|LINK|mutability|MUTABLE|url|http://java.sun.com/performance/jvmstat/visualgc.html^0|8|8|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

Try <a href="http://java.sun.com/performance/jvmstat/visualgc.html" rel="nofollow noreferrer">VisualGC</a> from Sun. There are JDK 4 and 5 versions that give you a nice visual of what's going on in the eden, generational, and perm spaces. You need to add a JAR and get a PID and Bob's your uncle.

blocks|key|1413041|text|几年前，John+Coome+(Hotspot+GC组)发布了PrintGCStats，这是一个awk脚本，用于“汇总垃圾收集的统计数据，特别是gc暂停时间总数、平均值、最大值和标准差”。该脚本的副本托管在java.net上：http://java.net/projects/printgcstats|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1413042|entityMap|0|LINK|mutability|MUTABLE|url|http://java.net/projects/printgcstats^0|35|11|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

A few years ago, John Coomes (Hotspot GC group) had released PrintGCStats, an awk script to "summarize statistics about garbage collection, in particular gc pause time totals, averages, maximum and standard deviations.". A copy of the script is hosted on java.net : <a href="http://java.net/projects/printgcstats" rel="nofollow">http://java.net/projects/printgcstats</a>

blocks|key|1627435|text|jconsole可以为您提供很多帮助，但我认为它只适用于Java5或更高版本。有一次我听到SUN在我们大学的演讲，他说Java6的垃圾收集器比旧的要好得多，旧的垃圾收集器对于大型应用程序几乎总是需要复杂的调优。Java6GC在SMP上的伸缩性似乎要好得多。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1627436|entityMap|0|LINK|mutability|MUTABLE|url|http://java.sun.com/developer/technicalArticles/J2SE/jconsole.html^0|0|8|0|8|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@$9|O|A|P|B|C]]|D|@$9|Q|A|R|1|S]]|E|$]]|$1|F|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|G|$H|$5|I|J|K|E|$L|M]]]]

<a href="http://java.sun.com/developer/technicalArticles/J2SE/jconsole.html" rel="nofollow noreferrer"><code>jconsole</code></a> can help you a lot, but I think it's Java 5 and later only. Once I heard someone of SUN speaking at our university and he said that Java 6's garbage collector is A LOT better than the old ones which needed complicated tuning nearly all the time for big applications. Java 6 GC seems to scale a lot better on SMPs.

blocks|key|1412986|text|gchisto+VisualVM插件不工作https://gchisto.dev.java.net/|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1412987|我有一个包含jdk1.6的printgc所有细节的文件，但是找不到工具来读取它。在之前的jdk1.5版本中，我们使用HPjmeter可以很好地工作，但现在在jdk1.6版本中就不行了|1412988|尝试执行以下操作:+IBM+Pattern+Modeling+and+Analysis+Tool+for+Java垃圾收集器--它无法识别该文件。GCCollector无法工作，它一直在读取文件进行分析。|1412989|entityMap|0|LINK|mutability|MUTABLE|url|https://gchisto.dev.java.net/^0|L|T|0|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@$A|Q|B|R|1|S]]|C|$]]|$1|D|3|E|5|6|7|T|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|U|8|@]|9|@]|C|$]]|$1|H|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|I|$J|$5|K|L|M|C|$N|O]]]]

gchisto plugin for VisualVM doesn't work <a href="https://gchisto.dev.java.net/" rel="nofollow">https://gchisto.dev.java.net/</a>

I have a file with all details of printgc for jdk1.6 but couldn't find a tool to read that.
Previously with jdk1.5 we used HPjmeter it worked fine, but now with jdk1.6 it doesn't

Tried following: IBM Pattern Modeling and Analysis Tool for Java Garbage Collector -- it doesn't recognizes the file. GCCollector doesn't work, it keep on reading file for analysis.

blocks|key|1627353|text|试试一些分析工具，比如JProbe免费软件(Eclipse+plug-in)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1627354|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

How about trying out some profiling tool like JProbe Freeware (Eclipse plug-in).

I'm looking for a tool or a script that will take the console log from my web app, parse out the garbage collection information and display it in a meaningful way.

I'm starting up on a Sun Java 1.4.2 JVM with the following flags:

<pre><code>-verbose:gc -XX:+PrintGCTimeStamps -XX:+PrintGCDetails
</code></pre>

The log output looks like this:

<pre><code>54.736: [Full GC 54.737: [Tenured: 172798K-&gt;18092K(174784K), 2.3792658 secs] 257598K-&gt;18092K(259584K), [Perm : 20476K-&gt;20476K(20480K)], 2.4715398 secs]
</code></pre>

Making sense of a few hundred of these kinds of log entries would be much easier if I had a tool that would visually graph garbage collection trends.

Know of any Java garbage collection log analysis tools?

我正在寻找一个工具或脚本，可以从我的web应用程序中获取控制台日志，解析出垃圾收集信息，并以有意义的方式显示它。我使用以下标志在Sun Java 1.4.2 JVM上启动：-verbose:gc -XX:+PrintGCTimeStamps -XX:+PrintGCDetails日志输出如下所示：54.736: [Full GC 54.737: [Tenured: 172798K->18092K(

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