eviction problem :: -f value
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farzan...@bamilo.com
Jan 16, 2018, 2:46:59 AM1/16/18
to memcached
Hi Guys
we use Memcached 1.4.21 and we got a lot of evictions I try to change -f to 1.1 for preventing evictions, is it okay to change -f value or should I try another method.
here our stats , stats slabs, and stats items detail with default -f 1.25 value:
Stats
===============================================
STAT uptime 4860763
STAT time 1516088646
STAT version 1.4.21
STAT libevent 2.0.21-stable
STAT pointer_size 64
STAT rusage_user 50141.684000
STAT rusage_system 109435.872000
STAT curr_connections 211
STAT total_connections 56669879
STAT connection_structures 433
STAT reserved_fds 20
STAT cmd_get 19743709498
STAT cmd_set 107396338
STAT cmd_flush 0
STAT cmd_touch 0
STAT get_hits 17430338962
STAT get_misses 2313370536
STAT delete_misses 4312232
STAT delete_hits 329854
STAT incr_misses 39752
STAT incr_hits 26636222
STAT decr_misses 0
STAT decr_hits 0
STAT cas_misses 0
STAT cas_hits 0
STAT cas_badval 0
STAT touch_hits 0
STAT touch_misses 0
STAT auth_cmds 0
STAT auth_errors 0
STAT bytes_read 1457584516608
STAT bytes_written 17191545528667
STAT limit_maxbytes 27936161792
STAT accepting_conns 1
STAT listen_disabled_num 0
STAT threads 4
STAT conn_yields 0
STAT hash_power_level 21
STAT hash_bytes 16777216
STAT hash_is_expanding 0
STAT malloc_fails 0
STAT bytes 19633850636
STAT curr_items 2056999
STAT total_items 107479673
STAT expired_unfetched 20124151
STAT evicted_unfetched 2609363
STAT evictions 2761292
STAT reclaimed 20778774
STAT crawler_reclaimed 0
STAT lrutail_reflocked 0
Stats Slabs
===============================================
STAT 1:chunk_size 96
STAT 1:chunks_per_page 10922
STAT 1:total_pages 2
STAT 1:total_chunks 21844
STAT 1:used_chunks 14823
STAT 1:free_chunks 7021
STAT 1:free_chunks_end 0
STAT 1:mem_requested 1383893
STAT 1:get_hits 40833927
STAT 1:cmd_set 17427307
STAT 1:delete_hits 3
STAT 1:incr_hits 26637054
STAT 1:decr_hits 0
STAT 1:cas_hits 0
STAT 1:cas_badval 0
STAT 1:touch_hits 0
STAT 2:chunk_size 120
STAT 2:chunks_per_page 8738
STAT 2:total_pages 11
STAT 2:total_chunks 96118
STAT 2:used_chunks 96117
STAT 2:free_chunks 1
STAT 2:free_chunks_end 0
STAT 2:mem_requested 10621909
STAT 2:get_hits 104399912
STAT 2:cmd_set 3074153
STAT 2:delete_hits 94
STAT 2:incr_hits 0
STAT 2:decr_hits 0
STAT 2:cas_hits 0
STAT 2:cas_badval 0
STAT 2:touch_hits 0
STAT 3:chunk_size 152
STAT 3:chunks_per_page 6898
STAT 3:total_pages 40
STAT 3:total_chunks 275920
STAT 3:used_chunks 275916
STAT 3:free_chunks 4
STAT 3:free_chunks_end 0
STAT 3:mem_requested 39608720
STAT 3:get_hits 43871158
STAT 3:cmd_set 24375338
STAT 3:delete_hits 37175
STAT 3:incr_hits 0
STAT 3:decr_hits 0
STAT 3:cas_hits 0
STAT 3:cas_badval 0
STAT 3:touch_hits 0
STAT 4:chunk_size 192
STAT 4:chunks_per_page 5461
STAT 4:total_pages 5
STAT 4:total_chunks 27305
STAT 4:used_chunks 27177
STAT 4:free_chunks 128
STAT 4:free_chunks_end 0
STAT 4:mem_requested 4504231
STAT 4:get_hits 77131349
STAT 4:cmd_set 4175673
STAT 4:delete_hits 678
STAT 4:incr_hits 0
STAT 4:decr_hits 0
STAT 4:cas_hits 0
STAT 4:cas_badval 0
STAT 4:touch_hits 0
STAT 5:chunk_size 240
STAT 5:chunks_per_page 4369
STAT 5:total_pages 6
STAT 5:total_chunks 26214
STAT 5:used_chunks 26053
STAT 5:free_chunks 161
STAT 5:free_chunks_end 0
STAT 5:mem_requested 5636482
STAT 5:get_hits 86480913
STAT 5:cmd_set 3359559
STAT 5:delete_hits 267
STAT 5:incr_hits 0
STAT 5:decr_hits 0
STAT 5:cas_hits 0
STAT 5:cas_badval 0
STAT 5:touch_hits 0
STAT 6:chunk_size 304
STAT 6:chunks_per_page 3449
STAT 6:total_pages 6
STAT 6:total_chunks 20694
STAT 6:used_chunks 20485
STAT 6:free_chunks 209
STAT 6:free_chunks_end 0
STAT 6:mem_requested 5577183
STAT 6:get_hits 14209154
STAT 6:cmd_set 1546280
STAT 6:delete_hits 1461
STAT 6:incr_hits 0
STAT 6:decr_hits 0
STAT 6:cas_hits 0
STAT 6:cas_badval 0
STAT 6:touch_hits 0
STAT 7:chunk_size 384
STAT 7:chunks_per_page 2730
STAT 7:total_pages 15
STAT 7:total_chunks 40950
STAT 7:used_chunks 40846
STAT 7:free_chunks 104
STAT 7:free_chunks_end 0
STAT 7:mem_requested 14051313
STAT 7:get_hits 110315659
STAT 7:cmd_set 1759382
STAT 7:delete_hits 423
STAT 7:incr_hits 0
STAT 7:decr_hits 0
STAT 7:cas_hits 0
STAT 7:cas_badval 0
STAT 7:touch_hits 0
STAT 8:chunk_size 480
STAT 8:chunks_per_page 2184
STAT 8:total_pages 17
STAT 8:total_chunks 37128
STAT 8:used_chunks 37123
STAT 8:free_chunks 5
STAT 8:free_chunks_end 0
STAT 8:mem_requested 16001821
STAT 8:get_hits 105794701
STAT 8:cmd_set 1471663
STAT 8:delete_hits 3872
STAT 8:incr_hits 0
STAT 8:decr_hits 0
STAT 8:cas_hits 0
STAT 8:cas_badval 0
STAT 8:touch_hits 0
STAT 9:chunk_size 600
STAT 9:chunks_per_page 1747
STAT 9:total_pages 174
STAT 9:total_chunks 303978
STAT 9:used_chunks 303975
STAT 9:free_chunks 3
STAT 9:free_chunks_end 0
STAT 9:mem_requested 178756198
STAT 9:get_hits 13346821942
STAT 9:cmd_set 5734278
STAT 9:delete_hits 1434
STAT 9:incr_hits 0
STAT 9:decr_hits 0
STAT 9:cas_hits 0
STAT 9:cas_badval 0
STAT 9:touch_hits 0
STAT 10:chunk_size 752
STAT 10:chunks_per_page 1394
STAT 10:total_pages 187
STAT 10:total_chunks 260678
STAT 10:used_chunks 260304
STAT 10:free_chunks 374
STAT 10:free_chunks_end 0
STAT 10:mem_requested 166545894
STAT 10:get_hits 1378383399
STAT 10:cmd_set 5192117
STAT 10:delete_hits 1305
STAT 10:incr_hits 0
STAT 10:decr_hits 0
STAT 10:cas_hits 0
STAT 10:cas_badval 0
STAT 10:touch_hits 0
STAT 11:chunk_size 944
STAT 11:chunks_per_page 1110
STAT 11:total_pages 50
STAT 11:total_chunks 55500
STAT 11:used_chunks 55500
STAT 11:free_chunks 0
STAT 11:free_chunks_end 0
STAT 11:mem_requested 45837080
STAT 11:get_hits 5648510
STAT 11:cmd_set 1347508
STAT 11:delete_hits 18902
STAT 11:incr_hits 0
STAT 11:decr_hits 0
STAT 11:cas_hits 0
STAT 11:cas_badval 0
STAT 11:touch_hits 0
STAT 12:chunk_size 1184
STAT 12:chunks_per_page 885
STAT 12:total_pages 53
STAT 12:total_chunks 46905
STAT 12:used_chunks 46893
STAT 12:free_chunks 12
STAT 12:free_chunks_end 0
STAT 12:mem_requested 49502517
STAT 12:get_hits 130959327
STAT 12:cmd_set 1694438
STAT 12:delete_hits 719
STAT 12:incr_hits 0
STAT 12:decr_hits 0
STAT 12:cas_hits 0
STAT 12:cas_badval 0
STAT 12:touch_hits 0
STAT 13:chunk_size 1480
STAT 13:chunks_per_page 708
STAT 13:total_pages 42
STAT 13:total_chunks 29736
STAT 13:used_chunks 29736
STAT 13:free_chunks 0
STAT 13:free_chunks_end 0
STAT 13:mem_requested 39754282
STAT 13:get_hits 216693042
STAT 13:cmd_set 1563287
STAT 13:delete_hits 345
STAT 13:incr_hits 0
STAT 13:decr_hits 0
STAT 13:cas_hits 0
STAT 13:cas_badval 0
STAT 13:touch_hits 0
STAT 14:chunk_size 1856
STAT 14:chunks_per_page 564
STAT 14:total_pages 102
STAT 14:total_chunks 57528
STAT 14:used_chunks 57524
STAT 14:free_chunks 4
STAT 14:free_chunks_end 0
STAT 14:mem_requested 97322526
STAT 14:get_hits 195471634
STAT 14:cmd_set 2255891
STAT 14:delete_hits 37590
STAT 14:incr_hits 0
STAT 14:decr_hits 0
STAT 14:cas_hits 0
STAT 14:cas_badval 0
STAT 14:touch_hits 0
STAT 15:chunk_size 2320
STAT 15:chunks_per_page 451
STAT 15:total_pages 364
STAT 15:total_chunks 164164
STAT 15:used_chunks 164162
STAT 15:free_chunks 2
STAT 15:free_chunks_end 0
STAT 15:mem_requested 340591436
STAT 15:get_hits 640970871
STAT 15:cmd_set 6641782
STAT 15:delete_hits 148323
STAT 15:incr_hits 0
STAT 15:decr_hits 0
STAT 15:cas_hits 0
STAT 15:cas_badval 0
STAT 15:touch_hits 0
STAT 16:chunk_size 2904
STAT 16:chunks_per_page 361
STAT 16:total_pages 132
STAT 16:total_chunks 47652
STAT 16:used_chunks 47438
STAT 16:free_chunks 214
STAT 16:free_chunks_end 0
STAT 16:mem_requested 118029988
STAT 16:get_hits 531669439
STAT 16:cmd_set 2855523
STAT 16:delete_hits 55727
STAT 16:incr_hits 0
STAT 16:decr_hits 0
STAT 16:cas_hits 0
STAT 16:cas_badval 0
STAT 16:touch_hits 0
STAT 17:chunk_size 3632
STAT 17:chunks_per_page 288
STAT 17:total_pages 17
STAT 17:total_chunks 4896
STAT 17:used_chunks 4842
STAT 17:free_chunks 54
STAT 17:free_chunks_end 0
STAT 17:mem_requested 15500286
STAT 17:get_hits 60386540
STAT 17:cmd_set 277213
STAT 17:delete_hits 3897
STAT 17:incr_hits 0
STAT 17:decr_hits 0
STAT 17:cas_hits 0
STAT 17:cas_badval 0
STAT 17:touch_hits 0
STAT 18:chunk_size 4544
STAT 18:chunks_per_page 230
STAT 18:total_pages 45
STAT 18:total_chunks 10350
STAT 18:used_chunks 10033
STAT 18:free_chunks 317
STAT 18:free_chunks_end 0
STAT 18:mem_requested 41757285
STAT 18:get_hits 67300149
STAT 18:cmd_set 392045
STAT 18:delete_hits 471
STAT 18:incr_hits 0
STAT 18:decr_hits 0
STAT 18:cas_hits 0
STAT 18:cas_badval 0
STAT 18:touch_hits 0
STAT 19:chunk_size 5680
STAT 19:chunks_per_page 184
STAT 19:total_pages 71
STAT 19:total_chunks 13064
STAT 19:used_chunks 12969
STAT 19:free_chunks 95
STAT 19:free_chunks_end 0
STAT 19:mem_requested 66910567
STAT 19:get_hits 31397821
STAT 19:cmd_set 165347
STAT 19:delete_hits 114
STAT 19:incr_hits 0
STAT 19:decr_hits 0
STAT 19:cas_hits 0
STAT 19:cas_badval 0
STAT 19:touch_hits 0
STAT 20:chunk_size 7104
STAT 20:chunks_per_page 147
STAT 20:total_pages 92
STAT 20:total_chunks 13524
STAT 20:used_chunks 13447
STAT 20:free_chunks 77
STAT 20:free_chunks_end 0
STAT 20:mem_requested 85126990
STAT 20:get_hits 9202694
STAT 20:cmd_set 215856
STAT 20:delete_hits 77
STAT 20:incr_hits 0
STAT 20:decr_hits 0
STAT 20:cas_hits 0
STAT 20:cas_badval 0
STAT 20:touch_hits 0
STAT 21:chunk_size 8880
STAT 21:chunks_per_page 118
STAT 21:total_pages 157
STAT 21:total_chunks 18526
STAT 21:used_chunks 14978
STAT 21:free_chunks 3548
STAT 21:free_chunks_end 0
STAT 21:mem_requested 119570462
STAT 21:get_hits 15579458
STAT 21:cmd_set 337726
STAT 21:delete_hits 3063
STAT 21:incr_hits 0
STAT 21:decr_hits 0
STAT 21:cas_hits 0
STAT 21:cas_badval 0
STAT 21:touch_hits 0
STAT 22:chunk_size 11104
STAT 22:chunks_per_page 94
STAT 22:total_pages 160
STAT 22:total_chunks 15040
STAT 22:used_chunks 11309
STAT 22:free_chunks 3731
STAT 22:free_chunks_end 0
STAT 22:mem_requested 115510193
STAT 22:get_hits 54518967
STAT 22:cmd_set 549042
STAT 22:delete_hits 265
STAT 22:incr_hits 0
STAT 22:decr_hits 0
STAT 22:cas_hits 0
STAT 22:cas_badval 0
STAT 22:touch_hits 0
STAT 23:chunk_size 13880
STAT 23:chunks_per_page 75
STAT 23:total_pages 418
STAT 23:total_chunks 31350
STAT 23:used_chunks 31175
STAT 23:free_chunks 175
STAT 23:free_chunks_end 0
STAT 23:mem_requested 383830770
STAT 23:get_hits 68874693
STAT 23:cmd_set 880720
STAT 23:delete_hits 14
STAT 23:incr_hits 0
STAT 23:decr_hits 0
STAT 23:cas_hits 0
STAT 23:cas_badval 0
STAT 23:touch_hits 0
STAT 24:chunk_size 17352
STAT 24:chunks_per_page 60
STAT 24:total_pages 931
STAT 24:total_chunks 55860
STAT 24:used_chunks 54143
STAT 24:free_chunks 1717
STAT 24:free_chunks_end 0
STAT 24:mem_requested 852775170
STAT 24:get_hits 11585192
STAT 24:cmd_set 1124622
STAT 24:delete_hits 8
STAT 24:incr_hits 0
STAT 24:decr_hits 0
STAT 24:cas_hits 0
STAT 24:cas_badval 0
STAT 24:touch_hits 0
STAT 25:chunk_size 21696
STAT 25:chunks_per_page 48
STAT 25:total_pages 1784
STAT 25:total_chunks 85632
STAT 25:used_chunks 82626
STAT 25:free_chunks 3006
STAT 25:free_chunks_end 0
STAT 25:mem_requested 1603370324
STAT 25:get_hits 19252824
STAT 25:cmd_set 1578345
STAT 25:delete_hits 13
STAT 25:incr_hits 0
STAT 25:decr_hits 0
STAT 25:cas_hits 0
STAT 25:cas_badval 0
STAT 25:touch_hits 0
STAT 26:chunk_size 27120
STAT 26:chunks_per_page 38
STAT 26:total_pages 3286
STAT 26:total_chunks 124868
STAT 26:used_chunks 84253
STAT 26:free_chunks 40615
STAT 26:free_chunks_end 0
STAT 26:mem_requested 2054265384
STAT 26:get_hits 6997978
STAT 26:cmd_set 1681130
STAT 26:delete_hits 4
STAT 26:incr_hits 0
STAT 26:decr_hits 0
STAT 26:cas_hits 0
STAT 26:cas_badval 0
STAT 26:touch_hits 0
STAT 27:chunk_size 33904
STAT 27:chunks_per_page 30
STAT 27:total_pages 3682
STAT 27:total_chunks 110460
STAT 27:used_chunks 31020
STAT 27:free_chunks 79440
STAT 27:free_chunks_end 0
STAT 27:mem_requested 954881220
STAT 27:get_hits 529122
STAT 27:cmd_set 2495465
STAT 27:delete_hits 193
STAT 27:incr_hits 0
STAT 27:decr_hits 0
STAT 27:cas_hits 0
STAT 27:cas_badval 0
STAT 27:touch_hits 0
STAT 28:chunk_size 42384
STAT 28:chunks_per_page 24
STAT 28:total_pages 249
STAT 28:total_chunks 5976
STAT 28:used_chunks 5561
STAT 28:free_chunks 415
STAT 28:free_chunks_end 0
STAT 28:mem_requested 212452495
STAT 28:get_hits 24921881
STAT 28:cmd_set 3890026
STAT 28:delete_hits 13402
STAT 28:incr_hits 0
STAT 28:decr_hits 0
STAT 28:cas_hits 0
STAT 28:cas_badval 0
STAT 28:touch_hits 0
STAT 29:chunk_size 52984
STAT 29:chunks_per_page 19
STAT 29:total_pages 1129
STAT 29:total_chunks 21451
STAT 29:used_chunks 338
STAT 29:free_chunks 21113
STAT 29:free_chunks_end 0
STAT 29:mem_requested 16208323
STAT 29:get_hits 25814198
STAT 29:cmd_set 5111385
STAT 29:delete_hits 0
STAT 29:incr_hits 0
STAT 29:decr_hits 0
STAT 29:cas_hits 0
STAT 29:cas_badval 0
STAT 29:touch_hits 0
STAT 30:chunk_size 66232
STAT 30:chunks_per_page 15
STAT 30:total_pages 11520
STAT 30:total_chunks 172800
STAT 30:used_chunks 165610
STAT 30:free_chunks 7190
STAT 30:free_chunks_end 0
STAT 30:mem_requested 9646696124
STAT 30:get_hits 217603
STAT 30:cmd_set 3361447
STAT 30:delete_hits 0
STAT 30:incr_hits 0
STAT 30:decr_hits 0
STAT 30:cas_hits 0
STAT 30:cas_badval 0
STAT 30:touch_hits 0
STAT 31:chunk_size 82792
STAT 31:chunks_per_page 12
STAT 31:total_pages 2068
STAT 31:total_chunks 24816
STAT 31:used_chunks 23712
STAT 31:free_chunks 1104
STAT 31:free_chunks_end 0
STAT 31:mem_requested 1698085763
STAT 31:get_hits 358039
STAT 31:cmd_set 664119
STAT 31:delete_hits 0
STAT 31:incr_hits 0
STAT 31:decr_hits 0
STAT 31:cas_hits 0
STAT 31:cas_badval 0
STAT 31:touch_hits 0
STAT 32:chunk_size 103496
STAT 32:chunks_per_page 10
STAT 32:total_pages 719
STAT 32:total_chunks 7190
STAT 32:used_chunks 6645
STAT 32:free_chunks 545
STAT 32:free_chunks_end 0
STAT 32:mem_requested 597365979
STAT 32:get_hits 1254549
STAT 32:cmd_set 151714
STAT 32:delete_hits 22
STAT 32:incr_hits 0
STAT 32:decr_hits 0
STAT 32:cas_hits 0
STAT 32:cas_badval 0
STAT 32:touch_hits 0
STAT 33:chunk_size 129376
STAT 33:chunks_per_page 8
STAT 33:total_pages 6
STAT 33:total_chunks 48
STAT 33:used_chunks 40
STAT 33:free_chunks 8
STAT 33:free_chunks_end 0
STAT 33:mem_requested 4668944
STAT 33:get_hits 8587
STAT 33:cmd_set 27871
STAT 33:delete_hits 0
STAT 33:incr_hits 0
STAT 33:decr_hits 0
STAT 33:cas_hits 0
STAT 33:cas_badval 0
STAT 33:touch_hits 0
STAT 34:chunk_size 161720
STAT 34:chunks_per_page 6
STAT 34:total_pages 71
STAT 34:total_chunks 426
STAT 34:used_chunks 193
STAT 34:free_chunks 233
STAT 34:free_chunks_end 0
STAT 34:mem_requested 29502443
STAT 34:get_hits 51239
STAT 34:cmd_set 16051
STAT 34:delete_hits 0
STAT 34:incr_hits 0
STAT 34:decr_hits 0
STAT 34:cas_hits 0
STAT 34:cas_badval 0
STAT 34:touch_hits 0
STAT 35:chunk_size 202152
STAT 35:chunks_per_page 5
STAT 35:total_pages 2
STAT 35:total_chunks 10
STAT 35:used_chunks 3
STAT 35:free_chunks 7
STAT 35:free_chunks_end 0
STAT 35:mem_requested 497000
STAT 35:get_hits 287
STAT 35:cmd_set 2199
STAT 35:delete_hits 0
STAT 35:incr_hits 0
STAT 35:decr_hits 0
STAT 35:cas_hits 0
STAT 35:cas_badval 0
STAT 35:touch_hits 0
STAT 37:chunk_size 315872
STAT 37:chunks_per_page 3
STAT 37:total_pages 1
STAT 37:total_chunks 3
STAT 37:used_chunks 1
STAT 37:free_chunks 2
STAT 37:free_chunks_end 0
STAT 37:mem_requested 294776
STAT 37:get_hits 0
STAT 37:cmd_set 332
STAT 37:delete_hits 0
STAT 37:incr_hits 0
STAT 37:decr_hits 0
STAT 37:cas_hits 0
STAT 37:cas_badval 0
STAT 37:touch_hits 0
STAT 39:chunk_size 493552
STAT 39:chunks_per_page 2
STAT 39:total_pages 1
STAT 39:total_chunks 2
STAT 39:used_chunks 1
STAT 39:free_chunks 1
STAT 39:free_chunks_end 0
STAT 39:mem_requested 431202
STAT 39:get_hits 2724909
STAT 39:cmd_set 299
STAT 39:delete_hits 0
STAT 39:incr_hits 0
STAT 39:decr_hits 0
STAT 39:cas_hits 0
STAT 39:cas_badval 0
STAT 39:touch_hits 0
STAT active_slabs 37
STAT total_malloced 27936161480
Stats Items
===============================================
STAT items:1:number 14823
STAT items:1:age 4859235
STAT items:1:evicted 0
STAT items:1:evicted_nonzero 0
STAT items:1:evicted_time 0
STAT items:1:outofmemory 0
STAT items:1:tailrepairs 0
STAT items:1:reclaimed 0
STAT items:1:expired_unfetched 0
STAT items:1:evicted_unfetched 0
STAT items:1:crawler_reclaimed 0
STAT items:1:lrutail_reflocked 0
STAT items:2:number 96117
STAT items:2:age 76901
STAT items:2:evicted 376084
STAT items:2:evicted_nonzero 0
STAT items:2:evicted_time 74811
STAT items:2:outofmemory 0
STAT items:2:tailrepairs 0
STAT items:2:reclaimed 2
STAT items:2:expired_unfetched 2
STAT items:2:evicted_unfetched 368452
STAT items:2:crawler_reclaimed 0
STAT items:2:lrutail_reflocked 0
STAT items:3:number 275899
STAT items:3:age 644841
STAT items:3:evicted 213781
STAT items:3:evicted_nonzero 0
STAT items:3:evicted_time 644812
STAT items:3:outofmemory 0
STAT items:3:tailrepairs 0
STAT items:3:reclaimed 74268
STAT items:3:expired_unfetched 74268
STAT items:3:evicted_unfetched 167170
STAT items:3:crawler_reclaimed 0
STAT items:3:lrutail_reflocked 0
STAT items:4:number 27182
STAT items:4:age 1722933
STAT items:4:evicted 9257
STAT items:4:evicted_nonzero 0
STAT items:4:evicted_time 1686879
STAT items:4:outofmemory 0
STAT items:4:tailrepairs 0
STAT items:4:reclaimed 39612
STAT items:4:expired_unfetched 39612
STAT items:4:evicted_unfetched 7264
STAT items:4:crawler_reclaimed 0
STAT items:4:lrutail_reflocked 0
STAT items:5:number 26062
STAT items:5:age 3716983
STAT items:5:evicted 1435
STAT items:5:evicted_nonzero 0
STAT items:5:evicted_time 3641481
STAT items:5:outofmemory 0
STAT items:5:tailrepairs 0
STAT items:5:reclaimed 158
STAT items:5:expired_unfetched 158
STAT items:5:evicted_unfetched 956
STAT items:5:crawler_reclaimed 0
STAT items:5:lrutail_reflocked 0
STAT items:6:number 20485
STAT items:6:age 1253527
STAT items:6:evicted 8042
STAT items:6:evicted_nonzero 0
STAT items:6:evicted_time 1177320
STAT items:6:outofmemory 0
STAT items:6:tailrepairs 0
STAT items:6:reclaimed 20
STAT items:6:expired_unfetched 20
STAT items:6:evicted_unfetched 6016
STAT items:6:crawler_reclaimed 0
STAT items:6:lrutail_reflocked 0
STAT items:7:number 40850
STAT items:7:age 3278961
STAT items:7:evicted 8814
STAT items:7:evicted_nonzero 0
STAT items:7:evicted_time 3204509
STAT items:7:outofmemory 0
STAT items:7:tailrepairs 0
STAT items:7:reclaimed 1
STAT items:7:expired_unfetched 1
STAT items:7:evicted_unfetched 6992
STAT items:7:crawler_reclaimed 0
STAT items:7:lrutail_reflocked 0
STAT items:8:number 37124
STAT items:8:age 1377080
STAT items:8:evicted 15521
STAT items:8:evicted_nonzero 0
STAT items:8:evicted_time 1377286
STAT items:8:outofmemory 0
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dormando
Jan 16, 2018, 3:00:22 AM1/16/18
to memcached
-f is very hard to tune. you need to actually look at what the overhead is
on each slab class.
If you want to reduce evictions the first thing you should try is the
latest version. There're a lot of changes to improve memory efficiency,
which may just fix your problem without you having to do anything else.
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on each slab class.
If you want to reduce evictions the first thing you should try is the
latest version. There're a lot of changes to improve memory efficiency,
which may just fix your problem without you having to do anything else.
>
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farzan dalaee
Jan 16, 2018, 3:14:34 AM1/16/18
to memc...@googlegroups.com
Thanks dormando for the quick response, how can I check for the overhead of slabs, I get confused a little.
> To unsubscribe from this group and stop receiving emails from it, send an email to memcached+unsubscribe@googlegroups.com.
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Best Regards
Farzan Dalaee
dormando
Jan 16, 2018, 3:47:11 AM1/16/18
to memc...@googlegroups.com
> STAT 5:total_pages 6
Each page is (1024 * 1024), so 6291456
> STAT 5:mem_requested 5636482
gives a ~89.5% fill rate. 10% overhead for a slab class is the average and
competely normal. You're trying to tune -f to reduce that overhead, but
it's not likely to help very much.
Try the latest version.
1) it will actively remove expired items from memory, instead of waiting
for them to be fetched or fall out the bottom.
2) it will balance memory between slab classes when they get too far apart
in age.
3) the segmented LRU might improve your hit ratio even with the same
number of evictions, by protecting active items.
4+) other improvements as well.
All by default since 1.5.0. 1.5.4 is the latest as of this writing.
-Dormando
> to memcached+...@googlegroups.com.
Each page is (1024 * 1024), so 6291456
> STAT 5:mem_requested 5636482
gives a ~89.5% fill rate. 10% overhead for a slab class is the average and
competely normal. You're trying to tune -f to reduce that overhead, but
it's not likely to help very much.
Try the latest version.
1) it will actively remove expired items from memory, instead of waiting
for them to be fetched or fall out the bottom.
2) it will balance memory between slab classes when they get too far apart
in age.
3) the segmented LRU might improve your hit ratio even with the same
number of evictions, by protecting active items.
4+) other improvements as well.
All by default since 1.5.0. 1.5.4 is the latest as of this writing.
-Dormando
> > For more options, visit https://groups.google.com/d/optout.
> >
> >
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> Best RegardsFarzan Dalaee
>
>
>
>
>
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> Best RegardsFarzan Dalaee
>
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farzan dalaee
Jan 16, 2018, 3:59:56 AM1/16/18
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Thanks again, really appreciated.
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