Apache Impala

Memory Usage

Memory consumption / limit: 358.91 MB / 49.41 GB

Breakdown

Process: Limit=49.41 GB Total=358.91 MB Peak=2.53 GB
  Buffer Pool: Free Buffers: Total=0
  Buffer Pool: Clean Pages: Total=0
  Buffer Pool: Unused Reservation: Total=0
  Control Service Queue: Limit=50.00 MB Total=0 Peak=146.96 KB
  Data Stream Service Queue: Limit=2.47 GB Total=0 Peak=48.91 KB
  Data Stream Manager Early RPCs: Total=0 Peak=0
  TCMalloc Overhead: Total=114.23 MB
  RequestPool=root.default: Total=0 Peak=168.22 MB
  RequestPool=fe-eval-exprs: Total=0 Peak=8.00 KB
  RequestPool=root.root: Total=0 Peak=7.46 MB
  Untracked Memory: Total=244.68 MB

tcmalloc

------------------------------------------------
MALLOC:      256565432 (  244.7 MiB) Bytes in use by application
MALLOC: +            0 (    0.0 MiB) Bytes in page heap freelist
MALLOC: +     28962712 (   27.6 MiB) Bytes in central cache freelist
MALLOC: +     10017568 (    9.6 MiB) Bytes in transfer cache freelist
MALLOC: +     80802960 (   77.1 MiB) Bytes in thread cache freelists
MALLOC: +      8286400 (    7.9 MiB) Bytes in malloc metadata
MALLOC:   ------------
MALLOC: =    384635072 (  366.8 MiB) Actual memory used (physical + swap)
MALLOC: +   5522366464 ( 5266.5 MiB) Bytes released to OS (aka unmapped)
MALLOC:   ------------
MALLOC: =   5907001536 ( 5633.4 MiB) Virtual address space used
MALLOC:
MALLOC:          10308              Spans in use
MALLOC:            273              Thread heaps in use
MALLOC:           8192              Tcmalloc page size
------------------------------------------------
Call ReleaseFreeMemory() to release freelist memory to the OS (via madvise()).
Bytes released to the OS take up virtual address space but no physical memory.

System

Physical Memory: 61.76 GB
Transparent Huge Pages Config:
  enabled: [always] madvise never
  defrag: [always] madvise never
  khugepaged defrag: 1

Process and system memory metrics

Name	Value	Description
`memory.mapped-bytes`	9.38 GB	Total bytes of memory mappings in this process (the virtual memory size).
`memory.rss`	779.29 MB	Resident set size (RSS) of this process, including TCMalloc, buffer pool and Jvm.
`memory.thp.defrag`	[always] madvise never	The system-wide 'defrag' setting for Transparent Huge Pages.
`memory.thp.enabled`	[always] madvise never	The system-wide 'enabled' setting for Transparent Huge Pages.
`memory.thp.khugepaged-defrag`	1	The system-wide 'defrag' setting for khugepaged.
`memory.total-used`	358.91 MB	Total memory currently used by TCMalloc and buffer pool.

Buffer pool memory metrics

Name	Value	Description
`buffer-pool.arena-0.allocated-buffer-sizes`	Count: 258, min / max: 8.00 KB / 2.00 MB, 25th %-ile: 8.00 KB, 50th %-ile: 32.00 KB, 75th %-ile: 64.00 KB, 90th %-ile: 64.00 KB, 95th %-ile: 128.00 KB, 99.9th %-ile: 2.00 MB	Statistics for buffer sizes allocated from the system. Only a subset of allocations are counted in this metric to reduce overhead.
`buffer-pool.arena-0.clean-page-hits`	0	Number of times a clean page was evicted to fulfil an allocation.
`buffer-pool.arena-0.direct-alloc-count`	16.57K	Number of times a new buffer was directly allocated from the system allocator to fulfil an allocation.
`buffer-pool.arena-0.local-arena-free-buffer-hits`	405.38K	Number of times a free buffer was recycled from this core's arena to fulfil an allocation.
`buffer-pool.arena-0.num-final-scavenges`	0	Number of times the allocator had to lock all arenas and scavenge to fulfil an allocation.
`buffer-pool.arena-0.num-scavenges`	0	Number of times the allocator had to scavenge to fulfil an allocation.
`buffer-pool.arena-0.numa-arena-free-buffer-hits`	0	Number of times that a recycled buffer within the same NUMA node was used to fulfil an allocation.
`buffer-pool.arena-0.system-alloc-time`	51.002ms	Total time the buffer pool spent in the system allocator for this arena.
`buffer-pool.arena-1.allocated-buffer-sizes`	Count: 293, min / max: 8.00 KB / 1.00 MB, 25th %-ile: 32.00 KB, 50th %-ile: 64.00 KB, 75th %-ile: 64.00 KB, 90th %-ile: 64.00 KB, 95th %-ile: 128.00 KB, 99.9th %-ile: 1.00 MB	Statistics for buffer sizes allocated from the system. Only a subset of allocations are counted in this metric to reduce overhead.
`buffer-pool.arena-1.clean-page-hits`	0	Number of times a clean page was evicted to fulfil an allocation.
`buffer-pool.arena-1.direct-alloc-count`	18.81K	Number of times a new buffer was directly allocated from the system allocator to fulfil an allocation.
`buffer-pool.arena-1.local-arena-free-buffer-hits`	408.42K	Number of times a free buffer was recycled from this core's arena to fulfil an allocation.
`buffer-pool.arena-1.num-final-scavenges`	0	Number of times the allocator had to lock all arenas and scavenge to fulfil an allocation.
`buffer-pool.arena-1.num-scavenges`	0	Number of times the allocator had to scavenge to fulfil an allocation.
`buffer-pool.arena-1.numa-arena-free-buffer-hits`	0	Number of times that a recycled buffer within the same NUMA node was used to fulfil an allocation.
`buffer-pool.arena-1.system-alloc-time`	63.002ms	Total time the buffer pool spent in the system allocator for this arena.
`buffer-pool.arena-2.allocated-buffer-sizes`	Count: 241, min / max: 8.00 KB / 1.00 MB, 25th %-ile: 8.00 KB, 50th %-ile: 64.00 KB, 75th %-ile: 64.00 KB, 90th %-ile: 64.00 KB, 95th %-ile: 128.00 KB, 99.9th %-ile: 1.00 MB	Statistics for buffer sizes allocated from the system. Only a subset of allocations are counted in this metric to reduce overhead.
`buffer-pool.arena-2.clean-page-hits`	0	Number of times a clean page was evicted to fulfil an allocation.
`buffer-pool.arena-2.direct-alloc-count`	15.44K	Number of times a new buffer was directly allocated from the system allocator to fulfil an allocation.
`buffer-pool.arena-2.local-arena-free-buffer-hits`	487.47K	Number of times a free buffer was recycled from this core's arena to fulfil an allocation.
`buffer-pool.arena-2.num-final-scavenges`	0	Number of times the allocator had to lock all arenas and scavenge to fulfil an allocation.
`buffer-pool.arena-2.num-scavenges`	0	Number of times the allocator had to scavenge to fulfil an allocation.
`buffer-pool.arena-2.numa-arena-free-buffer-hits`	0	Number of times that a recycled buffer within the same NUMA node was used to fulfil an allocation.
`buffer-pool.arena-2.system-alloc-time`	51.002ms	Total time the buffer pool spent in the system allocator for this arena.
`buffer-pool.arena-3.allocated-buffer-sizes`	Count: 259, min / max: 8.00 KB / 1.00 MB, 25th %-ile: 32.00 KB, 50th %-ile: 64.00 KB, 75th %-ile: 64.00 KB, 90th %-ile: 64.00 KB, 95th %-ile: 128.00 KB, 99.9th %-ile: 1.00 MB	Statistics for buffer sizes allocated from the system. Only a subset of allocations are counted in this metric to reduce overhead.
`buffer-pool.arena-3.clean-page-hits`	0	Number of times a clean page was evicted to fulfil an allocation.
`buffer-pool.arena-3.direct-alloc-count`	16.58K	Number of times a new buffer was directly allocated from the system allocator to fulfil an allocation.
`buffer-pool.arena-3.local-arena-free-buffer-hits`	391.06K	Number of times a free buffer was recycled from this core's arena to fulfil an allocation.
`buffer-pool.arena-3.num-final-scavenges`	0	Number of times the allocator had to lock all arenas and scavenge to fulfil an allocation.
`buffer-pool.arena-3.num-scavenges`	0	Number of times the allocator had to scavenge to fulfil an allocation.
`buffer-pool.arena-3.numa-arena-free-buffer-hits`	0	Number of times that a recycled buffer within the same NUMA node was used to fulfil an allocation.
`buffer-pool.arena-3.system-alloc-time`	62.002ms	Total time the buffer pool spent in the system allocator for this arena.
`buffer-pool.arena-4.allocated-buffer-sizes`	Count: 240, min / max: 8.00 KB / 2.00 MB, 25th %-ile: 8.00 KB, 50th %-ile: 64.00 KB, 75th %-ile: 64.00 KB, 90th %-ile: 64.00 KB, 95th %-ile: 512.00 KB, 99.9th %-ile: 2.00 MB	Statistics for buffer sizes allocated from the system. Only a subset of allocations are counted in this metric to reduce overhead.
`buffer-pool.arena-4.clean-page-hits`	0	Number of times a clean page was evicted to fulfil an allocation.
`buffer-pool.arena-4.direct-alloc-count`	15.42K	Number of times a new buffer was directly allocated from the system allocator to fulfil an allocation.
`buffer-pool.arena-4.local-arena-free-buffer-hits`	534.83K	Number of times a free buffer was recycled from this core's arena to fulfil an allocation.
`buffer-pool.arena-4.num-final-scavenges`	0	Number of times the allocator had to lock all arenas and scavenge to fulfil an allocation.
`buffer-pool.arena-4.num-scavenges`	0	Number of times the allocator had to scavenge to fulfil an allocation.
`buffer-pool.arena-4.numa-arena-free-buffer-hits`	0	Number of times that a recycled buffer within the same NUMA node was used to fulfil an allocation.
`buffer-pool.arena-4.system-alloc-time`	53.002ms	Total time the buffer pool spent in the system allocator for this arena.
`buffer-pool.arena-5.allocated-buffer-sizes`	Count: 275, min / max: 8.00 KB / 1.00 MB, 25th %-ile: 32.00 KB, 50th %-ile: 64.00 KB, 75th %-ile: 64.00 KB, 90th %-ile: 64.00 KB, 95th %-ile: 128.00 KB, 99.9th %-ile: 1.00 MB	Statistics for buffer sizes allocated from the system. Only a subset of allocations are counted in this metric to reduce overhead.
`buffer-pool.arena-5.clean-page-hits`	0	Number of times a clean page was evicted to fulfil an allocation.
`buffer-pool.arena-5.direct-alloc-count`	17.60K	Number of times a new buffer was directly allocated from the system allocator to fulfil an allocation.
`buffer-pool.arena-5.local-arena-free-buffer-hits`	376.99K	Number of times a free buffer was recycled from this core's arena to fulfil an allocation.
`buffer-pool.arena-5.num-final-scavenges`	0	Number of times the allocator had to lock all arenas and scavenge to fulfil an allocation.
`buffer-pool.arena-5.num-scavenges`	0	Number of times the allocator had to scavenge to fulfil an allocation.
`buffer-pool.arena-5.numa-arena-free-buffer-hits`	0	Number of times that a recycled buffer within the same NUMA node was used to fulfil an allocation.
`buffer-pool.arena-5.system-alloc-time`	68.002ms	Total time the buffer pool spent in the system allocator for this arena.
`buffer-pool.arena-6.allocated-buffer-sizes`	Count: 245, min / max: 8.00 KB / 1.00 MB, 25th %-ile: 8.00 KB, 50th %-ile: 64.00 KB, 75th %-ile: 64.00 KB, 90th %-ile: 64.00 KB, 95th %-ile: 64.00 KB, 99.9th %-ile: 1.00 MB	Statistics for buffer sizes allocated from the system. Only a subset of allocations are counted in this metric to reduce overhead.
`buffer-pool.arena-6.clean-page-hits`	0	Number of times a clean page was evicted to fulfil an allocation.
`buffer-pool.arena-6.direct-alloc-count`	15.74K	Number of times a new buffer was directly allocated from the system allocator to fulfil an allocation.
`buffer-pool.arena-6.local-arena-free-buffer-hits`	522.47K	Number of times a free buffer was recycled from this core's arena to fulfil an allocation.
`buffer-pool.arena-6.num-final-scavenges`	0	Number of times the allocator had to lock all arenas and scavenge to fulfil an allocation.
`buffer-pool.arena-6.num-scavenges`	0	Number of times the allocator had to scavenge to fulfil an allocation.
`buffer-pool.arena-6.numa-arena-free-buffer-hits`	0	Number of times that a recycled buffer within the same NUMA node was used to fulfil an allocation.
`buffer-pool.arena-6.system-alloc-time`	44.001ms	Total time the buffer pool spent in the system allocator for this arena.
`buffer-pool.arena-7.allocated-buffer-sizes`	Count: 266, min / max: 8.00 KB / 1.00 MB, 25th %-ile: 64.00 KB, 50th %-ile: 64.00 KB, 75th %-ile: 64.00 KB, 90th %-ile: 64.00 KB, 95th %-ile: 256.00 KB, 99.9th %-ile: 1.00 MB	Statistics for buffer sizes allocated from the system. Only a subset of allocations are counted in this metric to reduce overhead.
`buffer-pool.arena-7.clean-page-hits`	0	Number of times a clean page was evicted to fulfil an allocation.
`buffer-pool.arena-7.direct-alloc-count`	17.04K	Number of times a new buffer was directly allocated from the system allocator to fulfil an allocation.
`buffer-pool.arena-7.local-arena-free-buffer-hits`	380.58K	Number of times a free buffer was recycled from this core's arena to fulfil an allocation.
`buffer-pool.arena-7.num-final-scavenges`	0	Number of times the allocator had to lock all arenas and scavenge to fulfil an allocation.
`buffer-pool.arena-7.num-scavenges`	0	Number of times the allocator had to scavenge to fulfil an allocation.
`buffer-pool.arena-7.numa-arena-free-buffer-hits`	0	Number of times that a recycled buffer within the same NUMA node was used to fulfil an allocation.
`buffer-pool.arena-7.system-alloc-time`	64.002ms	Total time the buffer pool spent in the system allocator for this arena.
`buffer-pool.clean-page-bytes`	0	Total bytes of clean page memory cached in the buffer pool.
`buffer-pool.clean-pages`	0	Total number of clean pages cached in the buffer pool.
`buffer-pool.clean-pages-limit`	4.20 GB	Limit on number of clean pages cached in the buffer pool.
`buffer-pool.free-buffer-bytes`	0	Total bytes of free buffer memory cached in the buffer pool.
`buffer-pool.free-buffers`	0	Total number of free buffers cached in the buffer pool.
`buffer-pool.limit`	42.00 GB	Maximum allowed bytes allocated by the buffer pool.
`buffer-pool.reserved`	0	Total bytes of buffers reserved by Impala subsystems
`buffer-pool.system-allocated`	0	Total buffer memory currently allocated by the buffer pool.
`buffer-pool.unused-reservation-bytes`	0	Total bytes of buffer reservations by Impala subsystems that are currently unused

JVM aggregate memory metrics

Name	Value	Description
`jvm.gc_total_extra_sleep_time_millis`	1m53s	Jvm Pause Detection Extra Sleep Time
`jvm.total.committed-usage-bytes`	467.25 MB	Jvm total Committed Usage Bytes
`jvm.total.current-usage-bytes`	308.22 MB	Jvm total Current Usage Bytes
`jvm.total.init-usage-bytes`	380.44 MB	Jvm total Init Usage Bytes
`jvm.total.max-usage-bytes`	1.61 GB	Jvm total Max Usage Bytes
`jvm.total.peak-committed-usage-bytes`	503.75 MB	Jvm total Peak Committed Usage Bytes
`jvm.total.peak-current-usage-bytes`	400.94 MB	Jvm total Peak Current Usage Bytes
`jvm.total.peak-init-usage-bytes`	380.44 MB	Jvm total Peak Init Usage Bytes
`jvm.total.peak-max-usage-bytes`	1.64 GB	Jvm total Peak Max Usage Bytes

JVM heap memory metrics

Name	Value	Description
`jvm.heap.committed-usage-bytes`	381.50 MB	Jvm heap Committed Usage Bytes
`jvm.heap.current-usage-bytes`	223.46 MB	Jvm heap Current Usage Bytes
`jvm.heap.init-usage-bytes`	394.00 MB	Jvm heap Init Usage Bytes
`jvm.heap.max-usage-bytes`	381.50 MB	Jvm heap Max Usage Bytes
`jvm.heap.peak-committed-usage-bytes`	0	Jvm heap Peak Committed Usage Bytes
`jvm.heap.peak-current-usage-bytes`	0	Jvm heap Peak Current Usage Bytes
`jvm.heap.peak-init-usage-bytes`	0	Jvm heap Peak Init Usage Bytes
`jvm.heap.peak-max-usage-bytes`	0	Jvm heap Peak Max Usage Bytes

JVM non-heap memory metrics

Name	Value	Description
`jvm.non-heap.committed-usage-bytes`	85.75 MB	Jvm non-heap Committed Usage Bytes
`jvm.non-heap.current-usage-bytes`	84.75 MB	Jvm non-heap Current Usage Bytes
`jvm.non-heap.init-usage-bytes`	2.44 MB	Jvm non-heap Init Usage Bytes
`jvm.non-heap.max-usage-bytes`	-1.00 B	Jvm non-heap Max Usage Bytes
`jvm.non-heap.peak-committed-usage-bytes`	0	Jvm non-heap Peak Committed Usage Bytes
`jvm.non-heap.peak-current-usage-bytes`	0	Jvm non-heap Peak Current Usage Bytes
`jvm.non-heap.peak-init-usage-bytes`	0	Jvm non-heap Peak Init Usage Bytes
`jvm.non-heap.peak-max-usage-bytes`	0	Jvm non-heap Peak Max Usage Bytes