1  cat /proc/pid/status

[oracle@MESDB2 ~]$ cat /proc/25777/status Name:   java State:  S (sleeping) SleepAVG:       39% Tgid:   25777 Pid:    25777 PPid:   25719 TracerPid:      0 Uid:    0       0       0       0 Gid:    0       0       0       0 FDSize: 1024 Groups: 0 1 2 3 4 6 10 VmPeak: 13371128 kB VmSize: 13371128 kB VmLck:         0 kB VmHWM:   8863616 kB VmRSS:   8861504 kB VmData: 13235444 kB VmStk:        96 kB VmExe:        36 kB VmLib:     92528 kB VmPTE:     17772 kB StaBrk: 552a5000 kB Brk:    5a5d7000 kB StaStk: 7fff3c977380 kB Threads:        111 SigQ:   1/263679 SigPnd: 0000000000000000 ShdPnd: 0000000000000000 SigBlk: 0000000000000000 SigIgn: 0000000000001001 SigCgt: 1000000181004cce CapInh: 0000000000000000 CapPrm: 00000000fffffeff CapEff: 00000000fffffeff Cpus_allowed:   00000000,00000000,00000000,00000000,00000000,00000000,00000000,ffffffff Mems_allowed:   00000000,00000003

2 pstree -p pid

[oracle@MESDB2 ~]$ pstree -p 25777 java(25777)-+-{java}(25778)             |-{java}(25779)             |-{java}(25780)             |-{java}(25781)             |-{java}(25782)             |-{java}(25783)             |-{java}(25784)             |-{java}(25785)             |-{java}(25786)             |-{java}(25787)             |-{java}(25788)             |-{java}(25789)             |-{java}(25790)             |-{java}(25791)             |-{java}(25792)             |-{java}(25793)             |-{java}(25794)             |-{java}(25795)             |-{java}(25796)             |-{java}(25797)             |-{java}(25798)             |-{java}(25799)             |-{java}(25802)             |-{java}(25803)             |-{java}(25804)             |-{java}(25805)             |-{java}(25806)             |-{java}(25807)             |-{java}(25808)             |-{java}(25809)             |-{java}(25810)             |-{java}(25811)             |-{java}(25812)             |-{java}(25814)             |-{java}(25815)             |-{java}(25818)             |-{java}(25826)             |-{java}(25827)             |-{java}(25828)             |-{java}(25829)             |-{java}(25830)             |-{java}(25831)             |-{java}(25832)             |-{java}(25833)             |-{java}(25834)             |-{java}(25835)             |-{java}(25836)             |-{java}(25837)             |-{java}(25838)             |-{java}(25839)             |-{java}(25840)             |-{java}(25841)             |-{java}(25842)             |-{java}(25843)             |-{java}(25844)             |-{java}(25845)             |-{java}(25846)             |-{java}(25847)             |-{java}(25848)             |-{java}(25849)             |-{java}(25850)             |-{java}(25851)             |-{java}(25852)             |-{java}(25853)             |-{java}(25854)             |-{java}(25855)             |-{java}(25856)             |-{java}(25857)             |-{java}(25858)             |-{java}(25859)             |-{java}(25860)             |-{java}(25861)             |-{java}(25862)             |-{java}(25863)             |-{java}(25864)             |-{java}(25865)             |-{java}(25866)             |-{java}(25867)             |-{java}(25868)             |-{java}(25869)             |-{java}(25870)             |-{java}(25871)             |-{java}(25872)             |-{java}(25873)             |-{java}(25874)             |-{java}(25875)             |-{java}(25876)             |-{java}(26010)             |-{java}(14700)             |-{java}(21051)             |-{java}(21052)             |-{java}(21053)             |-{java}(31584)             |-{java}(31585)             |-{java}(24519)             |-{java}(24520)             |-{java}(24521)             |-{java}(24522)             |-{java}(24523)             |-{java}(24524)             |-{java}(24525)             |-{java}(8525)             |-{java}(26670)             |-{java}(30257)             |-{java}(31038)             |-{java}(31039)             |-{java}(31040)             |-{java}(31041)             |-{java}(31042)             `-{java}(20793)

3 top -H -p pid