Description
The memory allocator was switched from tcmalloc to jemalloc for Linux/Mac in 4.0, and for Windows in 4.6.
The cbstats allocator documentation needs updating accordingly, as it currently still show tcmalloc information for all platforms/versions.
Sample output from 4.6.1:
$ /opt/couchbase/bin/cbstats localhost:11210 allocator -b beer-sample
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___ Begin jemalloc statistics ___
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Version: 4.1.1-3-g6ddfb081019d2c0b8da89f385a565067756d2b2d
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Assertions disabled
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config.malloc_conf: ""
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Run-time option settings:
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opt.abort: false
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opt.lg_chunk: 21
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opt.dss: "secondary"
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opt.narenas: 1
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opt.purge: "ratio"
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opt.lg_dirty_mult: 3 (arenas.lg_dirty_mult: 3)
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opt.stats_print: false
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opt.junk: "false"
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opt.quarantine: 0
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opt.redzone: false
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opt.zero: false
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opt.tcache: true
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opt.lg_tcache_max: 15
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CPUs: 1
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Arenas: 1
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Pointer size: 8
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Quantum size: 16
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Page size: 4096
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Min active:dirty page ratio per arena: 8:1
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Maximum thread-cached size class: 32768
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Chunk size: 2097152 (2^21)
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Allocated: 122005840, active: 124227584, metadata: 4277296, resident: 127926272, mapped: 134217728
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Current active ceiling: 125829120
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|
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Merged arenas stats:
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assigned threads: 22
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dss allocation precedence: N/A
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min active:dirty page ratio: N/A
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purging: dirty: 16, sweeps: 42, madvises: 212, purged: 5871
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allocated nmalloc ndalloc nrequests
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small: 36800848 442780 300573 4865005
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large: 60039168 9760 7660 19878
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huge: 25165824 7 4 7
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total: 122005840 452547 308237 4884890
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active: 124227584
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mapped: 132120576
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metadata: mapped: 2506752, allocated: 647472
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bins: size ind allocated nmalloc ndalloc nrequests curregs curruns regs pgs util nfills nflushes newruns reruns
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8 0 9280 9314 8154 133231 1160 4 512 1 0.566 325 360 4 20
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16 1 26336 7455 5809 76025 1646 8 256 1 0.803 266 326 10 53
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32 2 1250656 101103 62020 384962 39083 355 128 1 0.860 8934 1032 553 1219
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48 3 862944 101748 83770 1018848 17978 104 256 3 0.675 8580 1209 204 1028
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64 4 1146880 37028 19108 1220349 17920 287 64 1 0.975 984 753 427 1213
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80 5 1453200 54206 36041 135198 18165 100 256 5 0.709 4617 740 105 1185
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96 6 1284576 23775 10394 452298 13381 118 128 3 0.885 1972 513 123 708
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112 7 693280 35149 28959 40009 6190 27 256 7 0.895 1777 561 121 179
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128 8 56192 24221 23782 48207 439 14 32 1 0.979 2321 991 709 222
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160 9 189920 7300 6113 13003 1187 13 128 5 0.713 616 378 23 99
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192 10 334656 4823 3080 47939 1743 28 64 3 0.972 175 293 39 278
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224 11 173824 3800 3024 19887 776 7 128 7 0.866 65 140 31 37
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256 12 1074944 7396 3197 23050 4199 302 16 1 0.868 1495 510 325 630
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320 13 548800 2489 774 21053 1715 29 64 5 0.924 72 117 32 25
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384 14 779904 2262 231 8450 2031 64 32 3 0.991 82 77 65 38
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448 15 307328 1308 622 7797 686 12 64 7 0.893 36 89 13 12
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512 16 3111936 7071 993 48612 6078 762 8 1 0.997 1197 348 766 763
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640 17 379520 1266 673 1126333 593 19 32 5 0.975 77 128 27 40
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768 18 326400 620 195 4390 425 28 16 3 0.948 55 92 30 39
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896 19 344960 705 320 2496 385 13 32 7 0.925 40 98 17 15
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1024 20 234496 786 557 1941 229 58 4 1 0.987 199 258 117 316
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1280 21 3014400 2558 203 3160 2355 149 16 5 0.987 183 91 152 32
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1536 22 377856 419 173 531 246 32 8 3 0.960 59 84 42 45
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1792 23 290304 302 140 185 162 12 16 7 0.843 36 80 14 15
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2048 24 4450304 3827 1654 5273 2173 1099 2 1 0.988 665 356 1438 1179
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2560 25 163840 140 76 31 64 9 8 5 0.888 22 64 13 9
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3072 26 9216 50 47 7 3 1 4 3 0.750 5 53 12 3
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3584 27 0 40 40 5 0 0 8 7 1 4 49 8 0
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4096 28 61440 90 75 241 15 15 1 1 1 20 67 90 0
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5120 29 25600 40 35 7 5 2 4 5 0.625 4 51 10 2
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6144 30 104448 45 28 19 17 9 2 3 0.944 10 56 23 1
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7168 31 71680 10 0 0 10 3 4 7 0.833 1 45 3 0
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8192 32 860160 226 121 143 105 105 1 2 1 43 79 226 0
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10240 33 174080 146 129 20307 17 12 2 5 0.708 29 86 63 31
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12288 34 12607488 1062 36 1018 1026 1026 1 3 1 107 53 1062 0
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---
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large: size ind allocated nmalloc ndalloc nrequests curruns
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16384 36 311296 39 20 52 19
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---
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28672 39 59351040 2115 45 2115 2070
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32768 40 294912 67 58 10172 9
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40960 41 81920 1027 1025 1027 2
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---
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65536 44 0 94 94 94 0
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---
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131072 48 0 4 4 4 0
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163840 49 0 6408 6408 6408 0
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---
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262144 52 0 2 2 2 0
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---
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524288 56 0 2 2 2 0
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---
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1048576 60 0 2 2 2 0
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---
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huge: size ind allocated nmalloc ndalloc nrequests curhchunks
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2097152 64 4194304 6 4 6 2
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---
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20971520 77 20971520 1 0 1 1
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---
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--- End jemalloc statistics ---
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Attachments
Issue Links
- relates to
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DOC-1883 cbstats allocator is very sparse
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- Closed
-