Warning: Verbose GC Analyzer is quite old. It has been tested with Java 1.6 and needs to be updated to work with more recents JDKs.

#Introduction

Verbose GC Analyzer is a tool to generate a CSV export and a sum-up report of Java GC logs. mine Java GC logs and to generate :

• a sum-up report
• an HTML report with charts for young size, tenured size, promoted size, collection pause time and cpu wall time
• a CSV export

#Releases

• VerboseGCAnalyzer-1.3-bin.zip

#Compatibility

Works only for with the following JVM arguments -verbosegc -XX:+PrintGCDateStamps -XX:+PrintGCTimeStamps -XX:+PrintGCDetails -Xloggc:logs/gc.log and CMS collector. Tested with JDK 6.

#Sum-up report example

Total time: 20.51 min
Young size collected: 1456 GB
Young size collected: 1212.274 MB/s
Total size collected by minor GC: 1446 GB
Total size collected by minor GC: 1203.75 MB/s
Promoted size: 10 GB
Promoted size: 8.523 MB/s
Cpu Minor GC real: 4.9%
Cpu Major GC total processors: 55.87%
Cpu Major GC real: 3.6%
Cpu Major GC total processors: 32.26%

#HTML report example

#CSV export example

date,time,type,cpuReal,cpuUser,cpuSystem,collectionPauseTime,youngSizeBefore,youngSizeAfter,youngSizeMax,totalSizeBefore,totalSizeAfter,totalSizeMax,youngSizeCollected,totalSizeCollected,promotedSize,tenuredSizeBefore,tenuredSizeAfter
12-04-12 12:32:14,1495.246,PAR_NEW,0.2,2.07,0.07,0.191013,2716018,283763,2831168,2719113,304590,5976896,2432255,2414523,17732,3095,20827
12-04-12 12:32:17,1498.813,PAR_NEW,0.17,1.68,0.06,0.171789,2800371,270531,2831168,2821198,351127,5976896,2529840,2470071,59769,20827,80596
12-04-12 12:32:20,1501.483,PAR_NEW,0.12,1.27,0.02,0.114284,2787139,196920,2831168,2867735,308497,5976896,2590219,2559238,30981,80596,111577
12-04-12 12:32:38,1519.563,PAR_NEW,0.15,1.55,0.04,0.149614,2713528,175844,2831168,2825105,343742,5976896,2537684,2481363,56321,111577,167898
12-04-12 12:32:43,1524.376,PAR_NEW,0.14,1.59,0.03,0.14533,2692452,228574,2831168,2860350,443592,5976896,2463878,2416758,47120,167898,215018
12-04-12 12:32:46,1526.858,PAR_NEW,0.13,1.61,0.01,0.132943,2745182,314560,2831168,2960200,533091,5976896,2430622,2427109,3513,215018,218531
12-04-12 12:32:48,1528.855,PAR_NEW,0.16,1.58,0.08,0.164366,2831168,209028,2831168,3049699,529607,5976896,2622140,2520092,102048,218531,320579
12-04-12 12:32:55,1536.682,PAR_NEW,0.02,0.26,0.0,0.022403,2725636,91050,2831168,3046215,411629,5976896,2634586,2634586,0,320579,320579
12-04-12 12:33:03,1544.147,PAR_NEW,0.03,0.39,0.01,0.033644,2607658,85867,2831168,2928237,406447,5976896,2521791,2521790,1,320579,320580
12-04-12 12:33:07,1548.219,PAR_NEW,0.03,0.34,0.02,0.035601,2602475,54016,2831168,2923055,403462,5976896,2548459,2519593,28866,320580,349446
12-04-12 12:33:10,1551.612,PAR_NEW,0.02,0.22,0.0,0.022695,2570624,25121,2831168,2920070,382791,5976896,2545503,2537279,8224,349446,357670
12-04-12 12:33:17,1558.765,PAR_NEW,0.02,0.2,0.0,0.017609,2541729,20322,2831168,2899399,379813,5976896,2521407,2519586,1821,357670,359491
12-04-12 12:33:22,1563.786,PAR_NEW,0.03,0.26,0.0,0.025393,2536930,34415,2831168,2896421,397325,5976896,2502515,2499096,3419,359491,362910
12-04-12 12:33:27,1568.02,PAR_NEW,0.02,0.23,0.0,0.020401,2551023,33077,2831168,2913933,396887,5976896,2517946,2517046,900,362910,363810
12-04-12 12:33:30,1571.37,PAR_NEW,0.02,0.12,0.0,0.012661,2549685,24826,2831168,2913495,389373,5976896,2524859,2524122,737,363810,364547
[...]
12-04-12 12:52:06,2687.4,PAR_NEW,0.09,0.96,0.0,0.087718,2700042,186253,2831168,4957222,2466909,5976896,2513789,2490313,23476,2257180,2280656
12-04-12 12:52:09,2689.964,PAR_NEW,0.1,1.09,0.01,0.096835,2702861,138697,2831168,4983517,2436045,5976896,2564164,2547472,16692,2280656,2297348
12-04-12 12:52:10,2691.816,PAR_NEW,0.11,1.14,0.0,0.101487,2655305,189954,2831168,4952653,2503400,5976896,2465351,2449253,16098,2297348,2313446
12-04-12 12:52:40,2721.221,PAR_NEW,0.08,0.93,0.01,0.077265,2516608,143541,2831168,3371825,998758,5976896,2373067,2373067,0,855217,855217
12-04-12 12:52:42,2723.044,PAR_NEW,0.12,1.5,0.0,0.120165,2660149,249983,2831168,3515366,1105201,5976896,2410166,2410165,1,855217,855218
12-04-12 12:52:43,2724.449,PAR_NEW,0.14,1.59,0.0,0.142116,2766591,216414,2831168,3621809,1117637,5976896,2550177,2504172,46005,855218,901223
12-04-12 12:52:44,2725.62,PAR_NEW,0.1,1.25,0.01,0.102439,2733022,241279,2831168,3634245,1142502,5976896,2491743,2491743,0,901223,901223

#Getting started

• wget http://verbosegcanalyzer.googlecode.com/files/VerboseGCAnalyzer-<major>.<inc>-bin.zip
• unzip VerboseGCAnalyzer-<major>.<inc>-bin.zip
• cd VerboseGCAnalyzer-<major>.<inc>/bin
• chmod 775 start.sh
• /start.sh java_gc.log

#Configuration

• Change conf/conf.properties to configure Verbose GC Analyzer:

Key	Default	Comments
dateFormat	yyyy-MM-dd'T'HH:mm:ss.SSSZ	Date format of the Java GC logs
exportDateFormat	yy-MM-dd HH:mm:ss	Date format of the CSV export
startDate	None	Start date in exportDateFormat format to filter the report
endDate	None	End date in exportDateFormat format to filter the report
exportHTMLReport	true
exportCSV	true	Put false to disable CSV export
dislayMajorGC	false	Put true to export major GC in CSV