JaCoLine - Viewing Historical Command Line #9365
| Analysis Date | JDK | Operating System | CPU Architecture | Debug JVM? |
|---|---|---|---|---|
| 2023-09-15 | OpenJDK21 | Linux | x86 | N |
Results
Switches Identified
Switch Analysis
| Name | Type | Description | Default Value | Your Value |
|---|---|---|---|---|
| UseG1GC | boolean | Use the Garbage-First garbage collector | false | true |
| Analysis | OK | |||
| Name | Type | Description | Default Value | Your Value |
|---|---|---|---|---|
| MaxGCPauseMillis | int | Adaptive size policy maximum GC pause time goal in millisecond, or (G1 Only) the maximum GC time per MMU time slice |
max_uintx - 1 in range(1, max_uintx - 1) | 37 |
| Analysis | OK | |||
| Name | Type | Description | Default Value | Your Value |
|---|---|---|---|---|
| G1HeapRegionSize | size_t | Size of the G1 regions. | 0 in range(0, NOT_LP64(32*M) LP64_ONLY(512*M)) | 16M |
| Analysis | OK | |||
| Name | Type | Description | Default Value | Your Value |
|---|---|---|---|---|
| G1NewSizePercent | int | Percentage (0-100) of the heap size to use as default minimum young gen size. |
5 in range(0, 100) | 23 |
| Analysis | OK | |||
| Name | Type | Description | Default Value | Your Value |
|---|---|---|---|---|
| G1ReservePercent | int | It determines the minimum reserve we should have in the heap to minimize the probability of promotion failure. |
10 in range(0, 50) | 20 |
| Analysis | OK | |||
| Name | Type | Description | Default Value | Your Value |
|---|---|---|---|---|
| SurvivorRatio | int | Ratio of eden/survivor space size | 8 in range(1, max_uintx-2) | 32 |
| Analysis | OK | |||
| Name | Type | Description | Default Value | Your Value |
|---|---|---|---|---|
| G1MixedGCCountTarget | int | The target number of mixed GCs after a marking cycle. | 8 in range(0, max_uintx) | 3 |
| Analysis | OK | |||
| Name | Type | Description | Default Value | Your Value |
|---|---|---|---|---|
| G1HeapWastePercent | int | Amount of space, expressed as a percentage of the heap size, that G1 is willing not to collect to avoid expensive GCs. |
5 in range(0, 100) | 20 |
| Analysis | OK | |||
| Name | Type | Description | Default Value | Your Value |
|---|---|---|---|---|
| InitiatingHeapOccupancyPercent | int | The percent occupancy (IHOP) of the current old generation capacity above which a concurrent mark cycle will be initiated Its value may change over time if adaptive IHOP is enabled, otherwise the value remains constant. In the latter case a value of 0 will result as frequent as possible concurrent marking cycles. A value of 100 disables concurrent marking. Fragmentation waste in the old generation is not considered free space in this calculation. (G1 collector only) |
45 in range(0, 100) | 10 |
| Analysis | OK | |||
| Name | Type | Description | Default Value | Your Value |
|---|---|---|---|---|
| MaxTenuringThreshold | int | Maximum value for tenuring threshold | 15 in range(0, markWord::max_age + 1) | 1 |
| Analysis | OK | |||
| Name | Type | Description | Default Value | Your Value |
|---|---|---|---|---|
| G1SATBBufferEnqueueingThresholdPercent | int | Before enqueueing them, each mutator thread tries to do some filtering on the SATB buffers it generates. If post-filtering the percentage of retained entries is over this threshold the buffer will be enqueued for processing. A value of 0 specifies that mutator threads should not do such filtering. |
60 in range(0, 100) | 30 |
| Analysis | OK | |||
| Name | Type | Description | Default Value | Your Value |
|---|---|---|---|---|
| G1ConcMarkStepDurationMillis | double | Target duration of individual concurrent marking steps in milliseconds. |
10.0 in range(1.0, DBL_MAX) | 5.0 |
| Analysis | OK | |||
| Name | Type | Description | Default Value | Your Value |
|---|---|---|---|---|
| G1ConcRSHotCardLimit | int | The threshold that defines (>=) a hot card. | 4 in range(0, max_jubyte) | 16 |
| Analysis | This switch was removed after OpenJDK20. Your analysis was for OpenJDK21 | |||
| Name | Type | Description | Default Value | Your Value |
|---|---|---|---|---|
| G1ConcRefinementServiceIntervalMillis | int | The G1 service thread wakes up every specified number of milliseconds to do miscellaneous work. |
300 in range(0, max_jint) | 150 |
| Analysis | This switch was removed after OpenJDK19. Your analysis was for OpenJDK21 | |||
| Name | Type | Description | Default Value | Your Value |
|---|---|---|---|---|
| GCTimeRatio | int | Adaptive size policy application time to GC time ratio | 99 in range(0, max_juint) | 99 |
| Analysis | OK | |||