jvm

Type Members

1. class ContentionSnapshot extends AnyRef

   

   A thread contention summary providing a brief overview of threads that are BLOCKED, WAITING, or TIMED_WAITING

   A thread contention summary providing a brief overview of threads that are BLOCKED, WAITING, or TIMED_WAITING

   While this could be an object, we use instantiation as a signal of intent and enable contention monitoring.

2. case class CpuProfile(counts: Map[Seq[StackTraceElement], Long], duration: Duration, count: Int, missed: Int) extends Product with Serializable

   

   A CPU profile.

3. trait Estimator[T] extends AnyRef

   

   An estimator for values of type T.

4. case class Gc(count: Long, name: String, timestamp: Time, duration: Duration) extends Product with Serializable

   

5. class GcPredictor extends AnyRef

   

   A Gc predictor.

   A Gc predictor. This predicts a time based on measuring rates, which are reported to the given estimator. Rates are measured every period. The estimated GC time is based on interpolating the rate estimated by estimator.

6. case class Heap(allocated: Long, tenuringThreshold: Long, ageHisto: Seq[Long]) extends Product with Serializable

   

   Information about the Heap

   Information about the Heap

   allocated

   Estimated number of bytes that have been allocated so far (into eden)

   tenuringThreshold

   How many times an Object needs to be copied before being tenured.

   ageHisto

   Histogram of the number of bytes that have been copied as many times. Note: 0-indexed.

7. class Heapster extends AnyRef

   

   Support for heapster profiling (google perftools compatible):

   Support for heapster profiling (google perftools compatible):

   https://github.com/mariusaeriksen/heapster

8. class Hotspot extends Jvm

   

9. trait Jvm extends AnyRef

   

   Access JVM internal performance counters.

   Access JVM internal performance counters. We maintain a strict interface so that we are decoupled from the actual underlying JVM.

10. class Kalman extends AnyRef

    

    A simple Kalman filter to estimate a scalar value.

11. class KalmanGaussianError extends Kalman with Estimator[Double]

    

    A Kalman filter in which measurement errors are normally distributed over the given range (as a fraction of the measured value).

12. class LoadAverage extends Estimator[Double]

    

    Unix-like load average, an exponentially weighted moving average, smoothed to the given interval (counted in number of measurements).

    Unix-like load average, an exponentially weighted moving average, smoothed to the given interval (counted in number of measurements). See: https://web.mit.edu/saltzer/www/publications/instrumentation.html

13. trait Pool extends AnyRef

    

    A handle to a garbage collected memory pool.

14. case class PoolState(numCollections: Long, capacity: StorageUnit, used: StorageUnit) extends Product with Serializable

    

15. case class Safepoint(syncTimeMillis: Long, totalTimeMillis: Long, count: Long) extends Product with Serializable

    

    Information about the JVM's safepoint

    Information about the JVM's safepoint

    syncTimeMillis

    Cumulative time, in milliseconds, spent getting all threads to safepoint states

    totalTimeMillis

    Cumulative time, in milliseconds, that the application has been stopped for safepoint operations

    count

    The number of safepoints taken place since the JVM started

16. case class Snapshot(timestamp: Time, heap: Heap, lastGcs: Seq[Gc]) extends Product with Serializable

    

17. class WindowedMeans extends Estimator[Double]

    

    An estimator for weighted windows of means.