GC日志格式

最新推荐文章于 2023-08-08 18:41:20 发布
最新推荐文章于 2023-08-08 18:41:20 发布
阅读量290 收藏
点赞数
CC 4.0 BY-SA版权
版权声明：本文为博主原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接和本声明。
本文链接：https://blog.youkuaiyun.com/weixin_33669968/article/details/88888523
本文提供了三种不同的垃圾回收（GC）策略的日志示例，包括ParallelGC、CMSGC及G1GC。通过这些示例，读者可以了解不同GC策略的工作原理、触发条件以及性能指标。

摘要生成于 C知道 ，由 DeepSeek-R1 满血版支持， 前往体验 >

Parallel GC日志文件示例

  • server模式下模式的GC；
  • 相关参数：
    -XX:+PrintGCDetails
    -XX:+PrintGCTimeStamps
    -XX:+PrintGCDateStamps
    -Xloggc:C:\Users\LiXinlei\Desktop\gc.log
Java HotSpot(TM) 64-Bit Server VM (25.111-b14) for windows-amd64 JRE (1.8.0_111-b14), built on Sep 22 2016 19:24:05 by "java_re" with MS VC++ 10.0 (VS2010)
Memory: 4k page, physical 16687908k(9903672k free), swap 19178276k(11037860k free)
CommandLine flags: -XX:-BytecodeVerificationLocal -XX:-BytecodeVerificationRemote -XX:InitialHeapSize=267006528 -XX:+ManagementServer -XX:MaxHeapSize=4272104448 -XX:+PrintGC -XX:+PrintGCDateStamps -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:TieredStopAtLevel=1 -XX:+UseCompressedClassPointers -XX:+UseCompressedOops -XX:-UseLargePagesIndividualAllocation -XX:+UseParallelGC 
2019-03-25T16:58:33.315+0800: 3.033: [GC (Allocation Failure) [PSYoungGen: 65536K->7580K(76288K)] 65536K->7596K(251392K), 0.0153422 secs] [Times: user=0.00 sys=0.00, real=0.02 secs] 
2019-03-25T16:58:33.765+0800: 3.477: [GC (Metadata GC Threshold) [PSYoungGen: 70343K->10745K(76288K)] 70359K->11100K(251392K), 0.0180741 secs] [Times: user=0.00 sys=0.01, real=0.02 secs] 
2019-03-25T16:58:33.784+0800: 3.496: [Full GC (Metadata GC Threshold) [PSYoungGen: 10745K->0K(76288K)] [ParOldGen: 355K->10609K(100864K)] 11100K->10609K(177152K), [Metaspace: 20538K->20535K(1067008K)], 0.0413057 secs] [Times: user=0.13 sys=0.02, real=0.04 secs] 
2019-03-25T16:58:34.739+0800: 4.451: [GC (Allocation Failure) [PSYoungGen: 65536K->7193K(76288K)] 76145K->17874K(177152K), 0.0057675 secs] [Times: user=0.02 sys=0.00, real=0.01 secs] 
2019-03-25T16:58:35.452+0800: 5.164: [GC (Allocation Failure) [PSYoungGen: 72729K->10721K(113664K)] 83410K->24645K(214528K), 0.0102176 secs] [Times: user=0.02 sys=0.00, real=0.01 secs]

CMS GC日志文件示例

  • 相关参数：
    -XX:+UseConcMarkSweepGC
    -XX:+PrintGCDetails
    -XX:+PrintGCTimeStamps
    -XX:+PrintGCDateStamps
    -Xloggc:C:\Users\LiXinlei\Desktop\gc.log
Java HotSpot(TM) 64-Bit Server VM (25.111-b14) for windows-amd64 JRE (1.8.0_111-b14), built on Sep 22 2016 19:24:05 by "java_re" with MS VC++ 10.0 (VS2010)
Memory: 4k page, physical 16687908k(10303640k free), swap 19178276k(11517632k free)
CommandLine flags: -XX:-BytecodeVerificationLocal -XX:-BytecodeVerificationRemote -XX:InitialHeapSize=267006528 -XX:+ManagementServer -XX:MaxHeapSize=4272104448 -XX:MaxNewSize=697933824 -XX:MaxTenuringThreshold=6 -XX:OldPLABSize=16 -XX:+PrintGC -XX:+PrintGCDateStamps -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:TieredStopAtLevel=1 -XX:+UseCompressedClassPointers -XX:+UseCompressedOops -XX:+UseConcMarkSweepGC -XX:-UseLargePagesIndividualAllocation -XX:+UseParNewGC 
2019-03-25T17:32:16.566+0800: 2.514: [GC (Allocation Failure) 2019-03-25T17:32:16.566+0800: 2.515: [ParNew: 69952K->7959K(78656K), 0.0143885 secs] 69952K->7959K(253440K), 0.0147581 secs] [Times: user=0.00 sys=0.00, real=0.01 secs] 
2019-03-25T17:32:17.068+0800: 3.016: [GC (Allocation Failure) 2019-03-25T17:32:17.068+0800: 3.016: [ParNew: 77911K->8704K(78656K), 0.0262204 secs] 77911K->14095K(253440K), 0.0263544 secs] [Times: user=0.09 sys=0.03, real=0.03 secs] 
2019-03-25T17:32:17.094+0800: 3.043: [GC (CMS Initial Mark) [1 CMS-initial-mark: 5391K(174784K)] 16298K(253440K), 0.0011395 secs] [Times: user=0.00 sys=0.00, real=0.00 secs] 
2019-03-25T17:32:17.095+0800: 3.044: [CMS-concurrent-mark-start]
2019-03-25T17:32:17.102+0800: 3.051: [CMS-concurrent-mark: 0.007/0.007 secs] [Times: user=0.00 sys=0.00, real=0.01 secs] 
2019-03-25T17:32:17.102+0800: 3.051: [CMS-concurrent-preclean-start]
2019-03-25T17:32:17.104+0800: 3.052: [CMS-concurrent-preclean: 0.001/0.001 secs] [Times: user=0.06 sys=0.00, real=0.00 secs] 
2019-03-25T17:32:17.104+0800: 3.052: [CMS-concurrent-abortable-preclean-start]
2019-03-25T17:32:17.447+0800: 3.396: [CMS-concurrent-abortable-preclean: 0.148/0.343 secs] [Times: user=0.61 sys=0.06, real=0.34 secs] 
2019-03-25T17:32:17.447+0800: 3.396: [GC (CMS Final Remark) [YG occupancy: 47765 K (78656 K)]2019-03-25T17:32:17.447+0800: 3.396: [Rescan (parallel) , 0.0050338 secs]2019-03-25T17:32:17.452+0800: 3.401: [weak refs processing, 0.0000939 secs]2019-03-25T17:32:17.452+0800: 3.401: [class unloading, 0.0023072 secs]2019-03-25T17:32:17.455+0800: 3.404: [scrub symbol table, 0.0026783 secs]2019-03-25T17:32:17.458+0800: 3.406: [scrub string table, 0.0002989 secs][1 CMS-remark: 5391K(174784K)] 53156K(253440K), 0.0110804 secs] [Times: user=0.00 sys=0.00, real=0.01 secs] 
2019-03-25T17:32:17.458+0800: 3.407: [CMS-concurrent-sweep-start]
2019-03-25T17:32:17.460+0800: 3.409: [CMS-concurrent-sweep: 0.002/0.002 secs] [Times: user=0.00 sys=0.00, real=0.00 secs] 
2019-03-25T17:32:17.460+0800: 3.409: [CMS-concurrent-reset-start]
2019-03-25T17:32:17.490+0800: 3.439: [CMS-concurrent-reset: 0.029/0.029 secs] [Times: user=0.05 sys=0.03, real=0.03 secs] 
2019-03-25T17:32:17.798+0800: 3.747: [GC (Allocation Failure) 2019-03-25T17:32:17.798+0800: 3.747: [ParNew: 78656K->8704K(78656K), 0.0103221 secs] 84043K->19076K(253440K), 0.0104859 secs] [Times: user=0.00 sys=0.02, real=0.01 secs]

G1 GC日志文件示例

  • 相关参数：
    -XX:+UseG1GC
    -XX:+PrintGCDetails
    -XX:+PrintGCTimeStamps
    -XX:+PrintGCDateStamps
    -Xloggc:C:\Users\LiXinlei\Desktop\gc.log
Java HotSpot(TM) 64-Bit Server VM (25.111-b14) for windows-amd64 JRE (1.8.0_111-b14), built on Sep 22 2016 19:24:05 by "java_re" with MS VC++ 10.0 (VS2010)
Memory: 4k page, physical 16687908k(9814760k free), swap 19178276k(10655844k free)
CommandLine flags: -XX:-BytecodeVerificationLocal -XX:-BytecodeVerificationRemote -XX:InitialHeapSize=267006528 -XX:+ManagementServer -XX:MaxHeapSize=4272104448 -XX:+PrintGC -XX:+PrintGCDateStamps -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:TieredStopAtLevel=1 -XX:+UseCompressedClassPointers -XX:+UseCompressedOops -XX:+UseG1GC -XX:-UseLargePagesIndividualAllocation 
2019-03-25T17:44:07.997+0800: 2.184: [GC pause (G1 Evacuation Pause) (young), 0.0038326 secs]
   [Parallel Time: 2.5 ms, GC Workers: 8]
      [GC Worker Start (ms): Min: 2183.9, Avg: 2183.9, Max: 2184.0, Diff: 0.1]
      [Ext Root Scanning (ms): Min: 0.3, Avg: 0.5, Max: 1.2, Diff: 0.9, Sum: 4.4]
      [Update RS (ms): Min: 0.0, Avg: 0.0, Max: 0.0, Diff: 0.0, Sum: 0.0]
         [Processed Buffers: Min: 0, Avg: 0.0, Max: 0, Diff: 0, Sum: 0]
      [Scan RS (ms): Min: 0.0, Avg: 0.0, Max: 0.0, Diff: 0.0, Sum: 0.0]
      [Code Root Scanning (ms): Min: 0.0, Avg: 0.0, Max: 0.1, Diff: 0.1, Sum: 0.3]
      [Object Copy (ms): Min: 1.0, Avg: 1.5, Max: 1.7, Diff: 0.8, Sum: 12.1]
      [Termination (ms): Min: 0.0, Avg: 0.0, Max: 0.0, Diff: 0.0, Sum: 0.1]
         [Termination Attempts: Min: 2, Avg: 33.6, Max: 43, Diff: 41, Sum: 269]
      [GC Worker Other (ms): Min: 0.0, Avg: 0.1, Max: 0.1, Diff: 0.1, Sum: 0.6]
      [GC Worker Total (ms): Min: 2.1, Avg: 2.2, Max: 2.2, Diff: 0.1, Sum: 17.5]
      [GC Worker End (ms): Min: 2186.1, Avg: 2186.1, Max: 2186.1, Diff: 0.0]
   [Code Root Fixup: 0.0 ms]
   [Code Root Purge: 0.0 ms]
   [Clear CT: 0.2 ms]
   [Other: 1.1 ms]
      [Choose CSet: 0.0 ms]
      [Ref Proc: 0.8 ms]
      [Ref Enq: 0.0 ms]
      [Redirty Cards: 0.2 ms]
      [Humongous Register: 0.0 ms]
      [Humongous Reclaim: 0.0 ms]
      [Free CSet: 0.1 ms]
   [Eden: 12.0M(12.0M)->0.0B(22.0M) Survivors: 0.0B->2048.0K Heap: 12.0M(256.0M)->2548.0K(256.0M)]
 [Times: user=0.00 sys=0.00, real=0.01 secs] 
2019-03-25T17:44:08.329+0800: 2.516: [GC pause (G1 Evacuation Pause) (young), 0.0054060 secs]
   [Parallel Time: 3.2 ms, GC Workers: 8]
      [GC Worker Start (ms): Min: 2515.7, Avg: 2515.7, Max: 2515.7, Diff: 0.1]
      [Ext Root Scanning (ms): Min: 0.2, Avg: 0.5, Max: 1.2, Diff: 1.1, Sum: 3.6]
      [Update RS (ms): Min: 0.0, Avg: 0.0, Max: 0.1, Diff: 0.1, Sum: 0.1]
         [Processed Buffers: Min: 0, Avg: 0.1, Max: 1, Diff: 1, Sum: 1]
      [Scan RS (ms): Min: 0.0, Avg: 0.0, Max: 0.0, Diff: 0.0, Sum: 0.0]
      [Code Root Scanning (ms): Min: 0.0, Avg: 0.4, Max: 2.5, Diff: 2.5, Sum: 3.1]
      [Object Copy (ms): Min: 0.3, Avg: 2.1, Max: 2.7, Diff: 2.4, Sum: 16.9]
      [Termination (ms): Min: 0.0, Avg: 0.1, Max: 0.1, Diff: 0.1, Sum: 0.5]
         [Termination Attempts: Min: 1, Avg: 26.6, Max: 42, Diff: 41, Sum: 213]
      [GC Worker Other (ms): Min: 0.0, Avg: 0.0, Max: 0.0, Diff: 0.0, Sum: 0.0]
      [GC Worker Total (ms): Min: 3.0, Avg: 3.0, Max: 3.1, Diff: 0.1, Sum: 24.2]
      [GC Worker End (ms): Min: 2518.7, Avg: 2518.7, Max: 2518.7, Diff: 0.0]
   [Code Root Fixup: 0.1 ms]
   [Code Root Purge: 0.0 ms]
   [Clear CT: 0.2 ms]
   [Other: 1.8 ms]
      [Choose CSet: 0.0 ms]
      [Ref Proc: 1.5 ms]
      [Ref Enq: 0.0 ms]
      [Redirty Cards: 0.2 ms]
      [Humongous Register: 0.0 ms]
      [Humongous Reclaim: 0.0 ms]
      [Free CSet: 0.1 ms]
   [Eden: 22.0M(22.0M)->0.0B(150.0M) Survivors: 2048.0K->3072.0K Heap: 24.5M(256.0M)->6169.5K(256.0M)]
 [Times: user=0.00 sys=0.00, real=0.01 secs] 
2019-03-25T17:44:08.981+0800: 3.167: [GC pause (Metadata GC Threshold) (young) (initial-mark), 0.0107070 secs]
   [Parallel Time: 5.0 ms, GC Workers: 8]
      [GC Worker Start (ms): Min: 3167.5, Avg: 3167.6, Max: 3167.9, Diff: 0.4]
      [Ext Root Scanning (ms): Min: 1.0, Avg: 1.2, Max: 1.4, Diff: 0.4, Sum: 9.5]
      [Update RS (ms): Min: 0.4, Avg: 0.6, Max: 0.9, Diff: 0.6, Sum: 4.5]
         [Processed Buffers: Min: 1, Avg: 1.8, Max: 4, Diff: 3, Sum: 14]
      [Scan RS (ms): Min: 0.0, Avg: 0.0, Max: 0.0, Diff: 0.0, Sum: 0.1]
      [Code Root Scanning (ms): Min: 0.0, Avg: 0.4, Max: 3.0, Diff: 3.0, Sum: 3.4]
      [Object Copy (ms): Min: 0.1, Avg: 2.6, Max: 3.1, Diff: 3.0, Sum: 20.4]
      [Termination (ms): Min: 0.0, Avg: 0.1, Max: 0.1, Diff: 0.1, Sum: 0.7]
         [Termination Attempts: Min: 1, Avg: 17.1, Max: 31, Diff: 30, Sum: 137]
      [GC Worker Other (ms): Min: 0.0, Avg: 0.0, Max: 0.0, Diff: 0.0, Sum: 0.1]
      [GC Worker Total (ms): Min: 4.6, Avg: 4.8, Max: 4.9, Diff: 0.4, Sum: 38.7]
      [GC Worker End (ms): Min: 3172.4, Avg: 3172.4, Max: 3172.4, Diff: 0.0]
   [Code Root Fixup: 0.1 ms]
   [Code Root Purge: 0.0 ms]
   [Clear CT: 0.2 ms]
   [Other: 5.4 ms]
      [Choose CSet: 0.0 ms]
      [Ref Proc: 4.9 ms]
      [Ref Enq: 0.0 ms]
      [Redirty Cards: 0.2 ms]
      [Humongous Register: 0.0 ms]
      [Humongous Reclaim: 0.0 ms]
      [Free CSet: 0.1 ms]
   [Eden: 81.0M(150.0M)->0.0B(140.0M) Survivors: 3072.0K->13.0M Heap: 86.5M(256.0M)->15.3M(256.0M)]
 [Times: user=0.00 sys=0.00, real=0.01 secs] 
2019-03-25T17:44:08.992+0800: 3.178: [GC concurrent-root-region-scan-start]
2019-03-25T17:44:08.996+0800: 3.182: [GC concurrent-root-region-scan-end, 0.0037941 secs]
2019-03-25T17:44:08.996+0800: 3.182: [GC concurrent-mark-start]
2019-03-25T17:44:08.998+0800: 3.185: [GC concurrent-mark-end, 0.0025361 secs]
2019-03-25T17:44:08.999+0800: 3.185: [GC remark 2019-03-25T17:44:08.999+0800: 3.185: [Finalize Marking, 0.0002742 secs] 2019-03-25T17:44:08.999+0800: 3.185: [GC ref-proc, 0.0005143 secs] 2019-03-25T17:44:09.000+0800: 3.186: [Unloading, 0.0019702 secs], 0.0031572 secs]
 [Times: user=0.00 sys=0.00, real=0.00 secs] 
2019-03-25T17:44:09.002+0800: 3.189: [GC cleanup 16M->16M(256M), 0.0008155 secs]
 [Times: user=0.00 sys=0.00, real=0.00 secs] 
2019-03-25T17:44:09.003+0800: 3.189: [GC concurrent-cleanup-start]
2019-03-25T17:44:09.003+0800: 3.189: [GC concurrent-cleanup-end, 0.0000108 secs]
2019-03-25T17:44:10.766+0800: 4.952: [GC pause (G1 Evacuation Pause) (young), 0.0184160 secs]
   [Parallel Time: 9.2 ms, GC Workers: 8]
      [GC Worker Start (ms): Min: 4952.3, Avg: 4952.4, Max: 4952.5, Diff: 0.2]
      [Ext Root Scanning (ms): Min: 0.3, Avg: 0.8, Max: 2.8, Diff: 2.5, Sum: 6.1]
      [Update RS (ms): Min: 0.0, Avg: 0.1, Max: 0.3, Diff: 0.3, Sum: 0.8]
         [Processed Buffers: Min: 0, Avg: 1.6, Max: 4, Diff: 4, Sum: 13]
      [Scan RS (ms): Min: 0.0, Avg: 0.0, Max: 0.0, Diff: 0.0, Sum: 0.1]
      [Code Root Scanning (ms): Min: 0.0, Avg: 0.3, Max: 0.6, Diff: 0.6, Sum: 2.6]
      [Object Copy (ms): Min: 6.0, Avg: 7.4, Max: 7.9, Diff: 1.9, Sum: 59.3]
      [Termination (ms): Min: 0.0, Avg: 0.0, Max: 0.0, Diff: 0.0, Sum: 0.1]
         [Termination Attempts: Min: 1, Avg: 41.0, Max: 60, Diff: 59, Sum: 328]
      [GC Worker Other (ms): Min: 0.0, Avg: 0.0, Max: 0.1, Diff: 0.1, Sum: 0.3]
      [GC Worker Total (ms): Min: 8.6, Avg: 8.7, Max: 8.8, Diff: 0.2, Sum: 69.3]
      [GC Worker End (ms): Min: 4961.0, Avg: 4961.1, Max: 4961.1, Diff: 0.0]
   [Code Root Fixup: 0.4 ms]
   [Code Root Purge: 0.1 ms]
   [Clear CT: 1.0 ms]
   [Other: 7.7 ms]
      [Choose CSet: 0.0 ms]
      [Ref Proc: 6.3 ms]
      [Ref Enq: 0.0 ms]
      [Redirty Cards: 1.0 ms]
      [Humongous Register: 0.0 ms]
      [Humongous Reclaim: 0.0 ms]
      [Free CSet: 0.1 ms]
   [Eden: 140.0M(140.0M)->0.0B(133.0M) Survivors: 13.0M->20.0M Heap: 155.2M(256.0M)->24.6M(256.0M)]
 [Times: user=0.11 sys=0.02, real=0.02 secs]
JVM的GC log
shirley_zx的专栏
11-26 1526
首先要打印gc log，需要加参数 打印简单的GC信息：-XX:+PrintGC 打印详细的GC信息：-XX:+PrintGCDateStamps，-XX:+PrintGCDetails 设置GC的日志路径： -Xloggc:/opt/sas/logs/gc.log-`date +"%Y%m%d_%H%M%S"` 设置GCLog为自动Rotation的，下面要跟GClog rotatio...
JVM——7.GC日志分析2(老年代GC)
m0_52325992的博客
07-09 418
文章目录1. 老年代GC1.1 代码执行流程1.2 GC日志分析2. 老年代GC进阶2.1 代码执行流程2.2 GC日志分析 1. 老年代GC JVM参数： -Xmx20m -Xms20m -Xmn10m -XX:SurvivorRatio=8 -XX:MaxTenuringThreshold=15 -XX:PretenureSizeThreshold=3m -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:+PrintGCDetails -XX:+Print
JVM的GC日志分析
cheshi8650的博客
12-13 135
JVM的GC日志的主要参数包括如下几个： -XX:+PrintGC 输出GC日志 -XX:+PrintGCDetails 输出GC的详细日志 -XX:+PrintGCTimeStamps 输出GC的时间戳（以基准时间的形式） -XX:+PrintGCDateStamps 输出GC的时间...
IBM-GC日志分析工具
09-24
IBM gc 日志分析工具IBM gc 日志分析工具IBM gc 日志分析工具IBM gc 日志分析工具IBM gc 日志分析工具IBM gc 日志分析工具IBM gc 日志分析工具IBM gc 日志分析工具IBM gc 日志分析工具IBM gc 日志分析工具
Java虚拟机GC日志分析
08-28
Java虚拟机GC日志分析 Java虚拟机GC日志分析是Java开发者不可或缺的一项技能，通过对GC日志的分析，可以了解Java虚拟机中的内存使用情况，避免内存溢出和性能问题。本文将对Java虚拟机GC日志分析进行详细的介绍，并...
Full GC 日志解析详解
实践求真知
09-09 3215
一日志格式 2021-09-06T08:44:49.453+0800: 4.396:[Full GC (MetadataGCThreshold) [PSYoungGen: 10082K->0K(89600K)] [ParOldGen: 32K->9638K(204800K)] 10114K->9638K(294400K), [Metaspace: 20158K->20156K(1067008K)], 0.0149928 secs] [Times: user=0.06 s...
JVM-CMS回收器-GC日志分析
zhangkezkzk的博客
08-23 991
CMS GC关键日志分析
GC日志文件格式（JVM调优）
诸葛小猿
07-09 2160
先通过一条《深入理解java虚拟机》一书中的一个例子gc日志来回顾一下gc日志的基本知识，下面是一条gc日志： 33.125：[GC[DefNew: 3324k->152k(3712k), 0.0025925 secs] 3324k>152k(11904k),0.0031680 secs] 从左至右，各个信息的意思为： 33.125： 自虚拟机启动以来经过的秒数，单位为秒； GC： 垃圾收集的停顿类型为不需要STW（Stop The World ）。如果是Full GC说明发生了STW。如果是
GC的日志格式详解
学海拾遗
06-13 759
当进行GC日志查看的时候会用到： 命令参数： –XX:+PrintGCDetails 通过这个参数可以获得GC 执行的详细信息。对于信息的格式内容为： [回收器运行 （GC触发原因）[触发GC的年代：回收前->回收后（这个年代总大小）] 回收前堆大小->回收后堆大小（堆的总大小），执行了多少时间完成的 时间单位][执行的用户态时间，执行的内核态时间，总用时时间，单位] 通过一个简单操作来进行查看 新建一个java文件 添加如下代码 public class DoGc { public st
JVM-GC日志格式及内存分配策略
zhangxm_qz的博客
03-15 786
理解GC日志 阅读gc日志是处理java虚拟机内存的基础技能，它是一些人为确定的规则，没有太多的技术含量。 GC日志开头的【GC 和 【full GC 说明垃圾收集停顿的类型，而不是区分新生代老年代的。如果有Full说明这次GC是发生了 stop the world 的。如果是 System.gc();方法触发的收集 那么这里会显示，【FullGC( System). DefNew [Tenur...
转载一篇GC日志格式用时查阅
白白胖胖充满希望
09-15 458
JVM相关参数设置 堆设置 -Xms :初始堆大小 -Xmx :最大堆大小 -XX:NewSize=n :设置年轻代大小 -XX:NewRatio=n: 设置年轻代和年老代的比值。如:为3，表示年轻代与年老代比值为1：3，年轻代占整个年轻代年老代和的1/4 -XX:SurvivorRatio=n :年轻代中Eden区与两个Survivor区的比值。注意Survivor区有两个。如：3，表示Eden：Survivor=3：2，一个Survivor区占整个年轻代的1/5 -XX:MaxPermSize=n..
分析GC日志
永无止境
07-28 185
文章目录GC分类GC日志分类MinorGCFullGCGC日志结构剖析GC日志分析工具GCEasyGCViewer GC分类 针对HotSpot VM的实现，它里面的GC按照回收区域又分为两大种类型：一种是部分收集（Partial GC），一种是整堆收集（Full GC） 部分收集（Partial GC）：不是完整收集整个Java堆的垃圾收集。其中又分为： 新生代收集（Minor GC / Young GC）：只是新生代（Eden / S0, S1）的垃圾收集 老年代收集（Major GC / Old
GC日志详细介绍
weixin_42073629的博客
04-24 2894
JVM的GC日志参数 GC日志相关的JVM参数，我们这里就用了下面几个参数 -XX:+PrintGCDetails在发生垃圾回收时打印内存回收详细的日志，并在进程退出时输出当前内存各区域分配情况。 -XX:+PrintGCTimeStamps 输出GC的时间戳（以基准时间的形式，如49.459，默认就是这个输出形式，可以不写） -XX:+PrintGCDateStamps 输出GC的时间戳（以以日期的形式，如2019-03-01T12:57:54.486+0800） -Xloggc:&lt...
【jvm】调优之gc日志配置
u012203062的博客
11-24 1590
GC 日志配置的最佳实验。
【JVM技术指南】「GC内存诊断-故障问题排查」一文教你如何打印及分析JVM的GC日志（实战分析上篇）
世界上并没有完美的程序，但是我们并不因此而沮丧，因为写程序就是一个不断追求完美的过程。
08-08 1933
当我们在开发Java应用程序时，JVM的GC（垃圾回收）是一个非常重要的话题。GC的作用是回收不再使用的内存，以便程序可以继续运行。在JVM中，GC的日志记录了GC的详细信息，包括GC的类型、时间、内存使用情况等。在本文中，我们将介绍JVM GC日志的格式、含义和分析方法。
GChisto：高效Java GC日志分析工具
3. **GC日志格式**：不同的Java版本和不同的垃圾收集器可能生成不同格式的GC日志。GChisto作为一个优秀的GC日志分析工具，应该能够适应这些变化，支持多种格式的GC日志解析。它需要能够识别并解析Java中常见的垃圾...
评论
添加红包

请填写红包祝福语或标题

个

红包个数最小为10个

元

红包金额最低5元

当前余额3.43元 前往充值 >
需支付：10.00元
成就一亿技术人!
领取后你会自动成为博主和红包主的粉丝 规则
hope_wisdom
发出的红包
实付元
使用余额支付
点击重新获取
扫码支付
钱包余额 0

抵扣说明：

1.余额是钱包充值的虚拟货币，按照1:1的比例进行支付金额的抵扣。
2.余额无法直接购买下载，可以购买VIP、付费专栏及课程。

余额充值