JaCoLine - Viewing Historical Command Line #8140
| Analysis Date | JDK | Operating System | CPU Architecture | Debug JVM? |
|---|---|---|---|---|
| 2023-05-26 | OpenJDK12 | Linux | x86 | N |
Results
Switches Identified
Switch Analysis
| Name | Type | Description | Default Value | Your Value |
|---|---|---|---|---|
| ms | <size> | set initial Java heap size | 256m | |
| Analysis | OK | |||
| Name | Type | Description | Default Value | Your Value |
|---|---|---|---|---|
| mx | <size> | set maximum Java heap size | 1024m | |
| Analysis | OK | |||
| Name | Type | Description | Default Value | Your Value |
|---|---|---|---|---|
| ss | <size> | set java thread stack size | 512k | |
| Analysis | OK | |||
| Name | Type | Description | Default Value | Your Value |
|---|---|---|---|---|
| CompressedClassSpaceSize | size_t | Maximum size of class area in Metaspace when compressed class pointers are used |
1*G in range(1*M, 3*G) | 64m |
| Analysis | OK | |||
| Name | Type | Description | Default Value | Your Value |
|---|---|---|---|---|
| MaxMetaspaceSize | size_t | Maximum size of Metaspaces (in bytes) | max_uintx | 256m |
| Analysis | OK | |||
| Name | Type | Description | Default Value | Your Value |
|---|---|---|---|---|
| UseShenandoahGC | boolean | Use the Shenandoah garbage collector | false | true |
| Analysis | OK | |||
| Name | Type | Description | Default Value | Your Value |
|---|---|---|---|---|
| UnlockExperimentalVMOptions | boolean | Enable normal processing of flags relating to experimental features |
false | true |
| Analysis | OK | |||
| Name | Type | Description | Default Value | Your Value |
|---|---|---|---|---|
| ShenandoahUncommit | boolean | Allow Shenandoah to uncommit unused memory. | true | true |
| Analysis | OK | |||
| Name | Type | Description | Default Value | Your Value |
|---|---|---|---|---|
| ShenandoahUncommitDelay | int | Shenandoah would start to uncommit memory for regions that were not used for more than this time. First use after that would incur allocation stalls. Actively used regions would never be uncommitted, because they never decay. Time is in milliseconds. Setting this delay to 0 effectively makes Shenandoah to uncommit the regions almost immediately. |
5*60*1000 | 30000 |
| Analysis | OK | |||
| Name | Type | Description | Default Value | Your Value |
|---|---|---|---|---|
| ShenandoahGCHeuristics | string | The heuristics to use in Shenandoah GC. Possible values: *) adaptive - adapt to maintain the given amount of free heap; *) static - start concurrent GC when static free heap threshold and static allocation threshold are tripped; *) passive - do not start concurrent GC, wait for Full GC; *) aggressive - run concurrent GC continuously, evacuate everything; *) compact - run GC with lower footprint target, may end up doing continuous GC, evacuate lots of live objects, uncommit heap aggressively; |
adaptive | compact |
| Analysis | OK | |||