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php - mongodb too many open files
怪我咯
怪我咯 2017-04-10 17:35:49
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問題描述:

   mac osx 環(huán)境
   通過tcp測試工具,創(chuàng)建3000個連接,就報 too many open files 具體錯誤:`

2016-05-11T00:59:29.772+0800 E STORAGE  [thread1] WiredTiger (23) [1462899569:771906][60793:0x70000020a000], log-server: /data/db/journal: opendir: Too many open files in system
2016-05-11T00:59:29.772+0800 E STORAGE  [thread1] WiredTiger (23) [1462899569:772155][60793:0x70000020a000], log-server: dirlist journal prefix WiredTigerPreplog: Too many open files in system
2016-05-11T00:59:29.772+0800 E STORAGE  [thread1] WiredTiger (23) [1462899569:772199][60793:0x70000020a000], log-server: log pre-alloc server error: Too many open files in system
2016-05-11T00:59:29.772+0800 E STORAGE  [thread1] WiredTiger (23) [1462899569:772239][60793:0x70000020a000], log-server: log server error: Too many open files in system
2016-05-11T00:59:33.022+0800 W FTDC     [ftdc] Uncaught exception in 'FileNotOpen: Failed to open interim file /data/db/diagnostic.data/metrics.interim.temp' in full-time diagnostic data capture subsystem. Shutting down the full-time diagnostic data capture subsystem.
2016-05-11T00:59:33.566+0800 E STORAGE  [thread2] WiredTiger (23) [1462899573:566795][60793:0x700000393000], file:WiredTiger.wt, WT_SESSION.checkpoint: WiredTiger.turtle: fopen: Too many open files in system
2016-05-11T00:59:33.568+0800 E STORAGE  [thread2] WiredTiger (23) [1462899573:568812][60793:0x700000393000], checkpoint-server: checkpoint server error: Too many open files in system
2016-05-11T00:59:33.568+0800 E STORAGE  [thread2] WiredTiger (-31804) [1462899573:568879][60793:0x700000393000], checkpoint-server: the process must exit and restart: WT_PANIC: WiredTiger library panic
2016-05-11T00:59:33.568+0800 I -        [thread2] Fatal Assertion 28558
2016-05-11T00:59:33.568+0800 I -        [thread2] 

`

怪我咯
怪我咯

走同樣的路,發(fā)現(xiàn)不同的人生

reply all(1)
Ty80

可以先查看一下允許多少個打開文件

Yaoxings-MacBook-Pro:db yaoxing$ ulimit -a
core file size          (blocks, -c) 0
data seg size           (kbytes, -d) unlimited
file size               (blocks, -f) unlimited
max locked memory       (kbytes, -l) unlimited
max memory size         (kbytes, -m) unlimited
open files                      (-n) 256
pipe size            (512 bytes, -p) 1
stack size              (kbytes, -s) 8192
cpu time               (seconds, -t) unlimited
max user processes              (-u) 709
virtual memory          (kbytes, -v) unlimited

實際上一進入mongoshell就會提示你這一點

2016-05-11T17:45:17.536+0800 I CONTROL [initandlisten] ** WARNING: soft rlimits too low. Number of files is 256, should be at least 1000

WiredTiger的工作原理跟MMAPv1不太一樣,一個集合一個文件,一個索引一個文件。所以你一共有多少集合,至少就會有集合數(shù)量x2個打開文件(以1集合文件+1索引文件計算)被占用。再考慮到網(wǎng)絡連接數(shù)量,要保證足夠大的open files值。open files可以通過以下命令修改:

ulimit -n 1024
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