4.2. Tuning Presto

The default Presto settings should work well for most workloads. The following information may help you if your cluster is facing a specific performance problem.

Config Properties

See Properties Reference.

JVM Settings

The following can be helpful for diagnosing GC issues:

  1. -XX:+PrintGCApplicationConcurrentTime
  2. -XX:+PrintGCApplicationStoppedTime
  3. -XX:+PrintGCCause
  4. -XX:+PrintGCDateStamps
  5. -XX:+PrintGCTimeStamps
  6. -XX:+PrintGCDetails
  7. -XX:+PrintReferenceGC
  8. -XX:+PrintClassHistogramAfterFullGC
  9. -XX:+PrintClassHistogramBeforeFullGC
  10. -XX:PrintFLSStatistics=2
  11. -XX:+PrintAdaptiveSizePolicy
  12. -XX:+PrintSafepointStatistics
  13. -XX:PrintSafepointStatisticsCount=1