Analysis Date | JDK | Operating System | CPU Architecture | Debug JVM? |
---|---|---|---|---|
2020-07-30 | OpenJDK11 | Linux | x86 | N |
Results
Switches Identified
Switch Analysis
Name | Type | Description | Default Value | Your Value |
---|---|---|---|---|
mx | <size> | set maximum Java heap size | 24g | |
Analysis | OK |
Name | Type | Description | Default Value | Your Value |
---|---|---|---|---|
ms | <size> | set initial Java heap size | 24g | |
Analysis | OK |
Name | Type | Description | Default Value | Your Value |
---|---|---|---|---|
NewSize | size_t | Initial new generation size (in bytes) | ScaleForWordSize(1*M) | 6g |
Analysis | OK |
Name | Type | Description | Default Value | Your Value |
---|---|---|---|---|
MaxNewSize | size_t | Maximum new generation size (in bytes), max_uintx means set ergonomically |
max_uintx in range(0, max_uintx) | 6g |
Analysis | OK |
Name | Type | Description | Default Value | Your Value |
---|---|---|---|---|
MaxDirectMemorySize | uint64_t | Maximum total size of NIO direct-buffer allocations | 0 in range(0, max_jlong) | 10240g |
Analysis | OK |
Name | Type | Description | Default Value | Your Value |
---|---|---|---|---|
UseConcMarkSweepGC | boolean | Use Concurrent Mark-Sweep GC in the old generation | false | true |
Analysis | This switch will be removed in the future. It will be Obsoleted in OpenJDK14. Expired in OpenJDK15. |
Name | Type | Description | Default Value | Your Value |
---|---|---|---|---|
log | <opts> | control JVM logging, use -Xlog:help for details | ::gc* | |
Analysis | Duplicate switch. This is overridden by -Xlog:age*=trace. |
Name | Type | Description | Default Value | Your Value |
---|---|---|---|---|
log | <opts> | control JVM logging, use -Xlog:help for details | ::safepoint | |
Analysis | Duplicate switch. This is overridden by -Xlog:age*=trace. |
Name | Type | Description | Default Value | Your Value |
---|---|---|---|---|
loggc | ::/var/logs/druid/historical.gc.log | |||
Analysis | OK |
Name | Type | Description | Default Value | Your Value |
---|---|---|---|---|
log | <opts> | control JVM logging, use -Xlog:help for details | age*=trace | |
Analysis | OK |
Name | Type | Description | Default Value | Your Value |
---|---|---|---|---|
NumberOfGCLogFiles | int | Number of gclog files in rotation (default: 0, no rotation) |
0 | 50 |
Analysis | This switch was removed after OpenJDK8. Your analysis was for OpenJDK11 |
Name | Type | Description | Default Value | Your Value |
---|---|---|---|---|
GCLogFileSize | int | GC log file size, requires UseGCLogFileRotation. Set to 0 to only trigger rotation via jcmd |
8*K | 10m |
Analysis | This switch was removed after OpenJDK8. Your analysis was for OpenJDK11 |
Name | Type | Description | Default Value | Your Value |
---|---|---|---|---|
ExitOnOutOfMemoryError | boolean | JVM exits on the first occurrence of an out-of-memory error | false | true |
Analysis | OK |
Name | Type | Description | Default Value | Your Value |
---|---|---|---|---|
HeapDumpOnOutOfMemoryError | boolean | Dump heap to file when java.lang.OutOfMemoryError is thrown | false | true |
Analysis | OK |
Name | Type | Description | Default Value | Your Value |
---|---|---|---|---|
HeapDumpPath | string | When HeapDumpOnOutOfMemoryError is on, the path (filename or directory) of the dump file (defaults to java_pid<pid>.hprof in the working directory) |
NULL | /var/logs/druid/historical.hprof |
Analysis | OK |