To configure JVM parameters to minimize garbage collection pauses, you can follow these steps:
1. Set the Heap Size:
- Set the Maximum Heap Size:- Use the `-Xmx` flag to set the maximum heap size.
- For example, `-Xmx2g` sets the maximum heap size to 2GB.
- Set the Initial Heap Size:
- Use the `-Xms` flag to set the initial heap size.
- For example, `-Xms2g` sets the initial heap size to 2GB.
2. Set the Young Generation Size:
- Set the Young Generation Size:- Use the `-Xmn` flag to set the young generation size.
- For example, `-Xmn1g` sets the young generation size to 1GB.
3. Set the Garbage Collector:
- Use the Garbage-First (G1) Garbage Collector:- Use the `-XX:+UseG1GC` flag to enable the G1 garbage collector.
- This collector is designed to minimize pause times.
4. Set the Max Pause Time:
- Set the Maximum Pause Time:- Use the `-XX:MaxGCPauseMillis` flag to set the maximum pause time.
- For example, `-XX:MaxGCPauseMillis=200` sets the maximum pause time to 200 milliseconds.
5. Set the Parallel GC Threads:
- Set the Number of Parallel GC Threads:- Use the `-XX:ParallelGCThreads` flag to set the number of parallel GC threads.
- For example, `-XX:ParallelGCThreads=20` sets the number of parallel GC threads to 20.
6. Set the Concurrent GC Threads:
- Set the Number of Concurrent GC Threads:- Use the `-XX:ConcGCThreads` flag to set the number of concurrent GC threads.
- For example, `-XX:ConcGCThreads=5` sets the number of concurrent GC threads to 5.
7. Set the Initiating Heap Occupancy Percentage:
- Set the Initiating Heap Occupancy Percentage:- Use the `-XX:InitiatingHeapOccupancyPercent` flag to set the initiating heap occupancy percentage.
- For example, `-XX:InitiatingHeapOccupancyPercent=70` sets the initiating heap occupancy percentage to 70%.
8. Monitor and Adjust:
- Monitor Garbage Collection:- Use tools like VisualVM or GCeasy to monitor garbage collection.
- Adjust JVM parameters as needed to minimize pause times.
By following these steps, you can configure JVM parameters to minimize garbage collection pauses and ensure efficient application performance.
Citations:[1] https://www.uber.com/blog/jvm-tuning-garbage-collection/
[2] https://docs.datastax.com/en/dse/6.8/managing/operations/configure-garbage-first-collection.html
[3] https://sematext.com/blog/java-garbage-collection-tuning/
[4] https://docs.oracle.com/cd/E55119_01/doc.71/e55122/cnf_jvmgc.htm
[5] https://docs.oracle.com/cd/E40972_01/doc.70/e40973/cnf_jvmgc.htm