show processlist [all]

Available since 1.0.0.

命令说明

获取当前所有连接的信息，如果指定all，表示同时显示正在sleep的连接信息. 通过json格式输出，重定向到文本中显示会更清晰

  1. shell> redis-cli -p 8903 show processlist all > a
  2. shell> cat a
  3. [
  4.     {
  5.         "id": 767,                          # session id
  6.         "host": "127.0.0.1:50834",
  7.         "args": [
  8.             "set",
  9.             "a",
  10.             "b"
  11.         ],
  12.         "authed": 1,
  13.         "dbid": 0,
  14.         "start_time": 1587451514479,        # 命令开始的毫秒时间戳
  15.         "duration": 153550,                 # 执行的时间（毫秒）
  16.         "session_ref": 3,
  17.         "holdinglocks": [                   # 持有锁信息
  18.             [
  19.                 5,                          # 锁的store id
  20.                 "a",                        # key级锁
  21.                 "X"                         # 锁的类型
  22.             ]
  23.         ]
  24.     },
  25.     {
  26.         "id": 3303,
  27.         "host": "127.0.0.1:51056",
  28.         "args": [
  29.             "get",
  30.             "a"
  31.         ],
  32.         "authed": 1,
  33.         "dbid": 0,
  34.         "start_time": 1587451643100,
  35.         "duration": 24929,
  36.         "session_ref": 3,
  37.         "waitlock": [                       # 等待锁的信息
  38.             5,
  39.             "a",
  40.             "X"
  41.         ]
  42.     },
  43.     {
  44.         "id": 3589,
  45.         "host": "127.0.0.1:51069",
  46.         "args": [
  47.             "show",
  48.             "processlist",
  49.             "all"
  50.         ],
  51.         "authed": 1,
  52.         "dbid": 0,
  53.         "start_time": 1587451668029,
  54.         "duration": 0,
  55.         "session_ref": 3
  56.     }
  57. ]

命令返回

Array reply

Examples

如上

show locks

命令说明

获取当前tendis进程上所有线程持有的锁信息，主要用来获取当前所有锁的状态 以及 归属于哪个线程, 用于排查死锁，重复上锁等问题

如果当前没有锁， 显示如下：

  1. 127.0.0.1:51002> show locks
  2. (empty list or set)

当前线程中包含锁的时候显示锁列表如下：

  1. 127.0.0.1:51003> show locks
  2.  1) "running: {id:12037349 target:store_4 targetHash:12626945507335128354 LockMode:X LockRes:0 threadId:0x7fbc345f0700}"
  3.  2) "running: {id:12037353 target:store_8 targetHash:5894286778622387524 LockMode:X LockRes:0 threadId:0x7fbc345f0700}"
  4.  3) "running: {id:12037352 target:store_7 targetHash:14410881189481979652 LockMode:X LockRes:0 threadId:0x7fbc345f0700}"
  5.  4) "running: {id:12037348 target:store_3 targetHash:2921060641710983428 LockMode:X LockRes:0 threadId:0x7fbc345f0700}"
  6.  5) "pending: {id:12037356 target:store_3 targetHash:2921060641710983428 LockMode:IX LockRes:1 threadId:0x7fbc211cb700}"
  7.  6) "running: {id:12037345 target:store_0 targetHash:8597937682813753033 LockMode:X LockRes:0 threadId:0x7fbc345f0700}"
  8.  7) "pending: {id:12037355 target:store_0 targetHash:8597937682813753033 LockMode:IX LockRes:1 threadId:0x7fbc219cc700}"
  9.  8) "pending: {id:12037359 target:store_0 targetHash:8597937682813753033 LockMode:IS LockRes:1 threadId:0x7fbc0e3e0700}"
  10.  9) "running: {id:12037354 target:store_9 targetHash:227896731122534032 LockMode:X LockRes:0 threadId:0x7fbc345f0700}"
  11. 10) "running: {id:12037351 target:store_6 targetHash:875462629852764501 LockMode:X LockRes:0 threadId:0x7fbc345f0700}"
  12. 11) "running: {id:12037347 target:store_2 targetHash:11940324784125777240 LockMode:X LockRes:0 threadId:0x7fbc345f0700}"
  13. 12) "running: {id:12037350 target:store_5 targetHash:7939884790480503227 LockMode:X LockRes:0 threadId:0x7fbc345f0700}"
  14. 13) "pending: {id:12037358 target:store_5 targetHash:7939884790480503227 LockMode:IX LockRes:1 threadId:0x7fbc201c9700}"
  15. 14) "running: {id:12037346 target:store_1 targetHash:11400597207708767293 LockMode:X LockRes:0 threadId:0x7fbc345f0700}"
  16. 15) "pending: {id:12037357 target:store_1 targetHash:11400597207708767293 LockMode:IX LockRes:1 threadId:0x7fbc209ca700}"

running表示以及获取的锁，pending表示正在等待的锁

  1. id：锁id 
  2. target: 上锁的对象，可能是store锁,chunk锁或者key锁
  3. targetHash：上锁shard等信息做hash得到的值，一般不需要关注
  4. lockMode: 锁的类型，有S锁,IS锁,X锁，IX锁
  5. threadId: 当前锁是属于哪个线程ID, 主要这个不是pid， 而是pstack输出的进程堆栈信息中的ID

Examples

如上