Runtime statistics

Fields

• gcs :: Word32

  Total number of GCs

• major_gcs :: Word32

  Total number of major (oldest generation) GCs

• allocated_bytes :: Word64

  Total bytes allocated

• max_live_bytes :: Word64

  Maximum live data (including large objects + compact regions)

• max_large_objects_bytes :: Word64

  Maximum live data in large objects

• max_compact_bytes :: Word64

  Maximum live data in compact regions

• max_slop_bytes :: Word64

  Maximum slop

• max_mem_in_use_bytes :: Word64

  Maximum memory in use by the RTS

• cumulative_live_bytes :: Word64

  Sum of live bytes across all major GCs. Divided by major_gcs gives the average live data over the lifetime of the program.

• copied_bytes :: Word64

  Sum of copied_bytes across all GCs

• par_copied_bytes :: Word64

  Sum of copied_bytes across all parallel GCs

• cumulative_par_max_copied_bytes :: Word64

  Sum of par_max_copied_bytes across all parallel GCs. Deprecated.

• cumulative_par_balanced_copied_bytes :: Word64

  Sum of par_balanced_copied bytes across all parallel GCs

• mutator_cpu_ns :: RtsTime

  Total CPU time used by the mutator

• mutator_elapsed_ns :: RtsTime

  Total elapsed time used by the mutator

• gc_cpu_ns :: RtsTime

  Total CPU time used by the GC

• gc_elapsed_ns :: RtsTime

  Total elapsed time used by the GC

• cpu_ns :: RtsTime

  Total CPU time (at the previous GC)

• elapsed_ns :: RtsTime

  Total elapsed time (at the previous GC)

• gc :: GCDetails

  Details about the most recent GC

Fields

• gcdetails_gen :: Word32

  The generation number of this GC

• gcdetails_threads :: Word32

  Number of threads used in this GC

• gcdetails_allocated_bytes :: Word64

  Number of bytes allocated since the previous GC

• gcdetails_live_bytes :: Word64

  Total amount of live data in the heap (incliudes large + compact data)

• gcdetails_large_objects_bytes :: Word64

  Total amount of live data in large objects

• gcdetails_compact_bytes :: Word64

  Total amount of live data in compact regions

• gcdetails_slop_bytes :: Word64

  Total amount of slop (wasted memory)

• gcdetails_mem_in_use_bytes :: Word64

  Total amount of memory in use by the RTS

• gcdetails_copied_bytes :: Word64

  Total amount of data copied during this GC

• gcdetails_par_max_copied_bytes :: Word64

  In parallel GC, the max amount of data copied by any one thread. Deprecated.

• gcdetails_par_balanced_copied_bytes :: Word64

  In parallel GC, the amount of balanced data copied by all threads

• gcdetails_sync_elapsed_ns :: RtsTime

  The time elapsed during synchronisation before GC

• gcdetails_cpu_ns :: RtsTime

  The CPU time used during GC itself

• gcdetails_elapsed_ns :: RtsTime

  The time elapsed during GC itself