进程分析

/proc/*/status

查看进程详细信息 cat /proc/<proc_id>/status

$ cat /proc/13151/status
Name:    java
Umask:    0022
State:    S (sleeping)
Tgid:    13151
Ngid:    0
Pid:    13151
PPid:    1
TracerPid:    0
Uid:    0    0    0    0
Gid:    0    0    0    0
FDSize:    512
Groups:
VmPeak:    12437952 kB
VmSize:     3874384 kB
VmLck:           0 kB
VmPin:           0 kB
VmHWM:      403324 kB
VmRSS:      392840 kB
RssAnon:      369012 kB
RssFile:       23828 kB
RssShmem:           0 kB
VmData:     3541084 kB
VmStk:         132 kB
VmExe:           4 kB
VmLib:       24072 kB
VmPTE:        1292 kB
VmSwap:           0 kB
Threads:    92
SigQ:    1/31823
SigPnd:    0000000000000000
ShdPnd:    0000000000000000
SigBlk:    0000000000000000
SigIgn:    0000000000000003
SigCgt:    2000000181005ccc
CapInh:    0000000000000000
CapPrm:    0000001fffffffff
CapEff:    0000001fffffffff
CapBnd:    0000001fffffffff
CapAmb:    0000000000000000
NoNewPrivs:    0
Seccomp:    0
Speculation_Store_Bypass:    vulnerable
Cpus_allowed:    3ff,ffffffff
Cpus_allowed_list:    0-41
Mems_allowed:    00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000001
Mems_allowed_list:    0
voluntary_ctxt_switches:    5
nonvoluntary_ctxt_switches:    5

各项含义：

• Threads: 线程数

/proc/sys/kernel/

• 线程数最大限制：/proc/sys/kernel/threads-max
• 进程数最大限制：/proc/sys/kernel/pid_max