linux pstack命令总结

pstack命令用来显示进程的栈跟踪。pstack命令必须由相应进程的属主或root账号运行。可以使用pstack来确定进程挂起的位置。此命令只有一个参数，那就是pid，具体关于pstack的介绍可以查看man手册，如下所示：

[root@DB-Server~]#manpstack

PSTACK(1)LinuxProgrammer’sManualPSTACK(1)

NAME

pstack-printastacktraceofarunningprocess

SYNOPSIS

pstackpid

DESCRIPTION

pstackattachestotheactiveprocessnamedbythepidonthecommandline,andprintsoutanexecutionstacktrace.IfELFsymbolsexistinthebinary(usuallythecase

unlessyouhaverunstrip(1)),thensymbolicaddressesareprintedaswell.

Iftheprocessispartofathreadgroup,thenpstackwillprintoutastacktraceforeachofthethreadsinthegroup.

SEEALSO

nm(1),ptrace(2),gdb(1)

AUTHORS

RossThompson<ross@whatsis.com>

RedHat,Inc.<http://bugzilla.redhat.com/bugzilla>

RedHatLinuxDec172004PSTACK(1)

(END)

例如我们可以使用pstack命令来查看Oracle监听进程的栈跟踪，如下所示
1：首先找到监听进程的进程号

[oracle@DB-Server~]$ps-ef|greplsn

oracle1202711806011:18pts/100:00:00greplsn

oracle3144010Mar04?00:01:41/u01/app/oracle/product/10.2.0/db_1/bin/tnslsnrLISTENER-inherit

2：将监听进程的栈跟踪信息写入文件lsn_pstack.log

[oracle@DB-Server~]$pstack31440>>lsn_pstack.log

[oracle@DB-Server~]$pstack31440>>lsn_pstack.log

[oracle@DB-Server~]$pstack31440>>lsn_pstack.log

[oracle@DB-Server~]$

3：如下所示，我们可以看到函数调用关系为：main->nsglma->nsevwait->ntevque->ntevpque->poll.

[oracle@DB-Server~]$morelsn_pstack.log

#00x0000003c7d0cb65finpoll()from/lib64/libc.so.6

#10x00007f82c63292e7inntevpque()from/u01/app/oracle/product/10.2.0/db_1/lib/libclntsh.so.10.1

#20x00007f82c6326aabinntevque()from/u01/app/oracle/product/10.2.0/db_1/lib/libclntsh.so.10.1

#30x00007f82c62fc81einnsevwait()from/u01/app/oracle/product/10.2.0/db_1/lib/libclntsh.so.10.1

#40x00000000004108d9innsglma()

#50x0000000000405abdinmain()

#00x0000003c7d0cb65finpoll()from/lib64/libc.so.6

#10x00007f82c63292e7inntevpque()from/u01/app/oracle/product/10.2.0/db_1/lib/libclntsh.so.10.1

#20x00007f82c6326aabinntevque()from/u01/app/oracle/product/10.2.0/db_1/lib/libclntsh.so.10.1

#30x00007f82c62fc81einnsevwait()from/u01/app/oracle/product/10.2.0/db_1/lib/libclntsh.so.10.1

#40x00000000004108d9innsglma()

#50x0000000000405abdinmain()

#00x0000003c7d0cb65finpoll()from/lib64/libc.so.6

#10x00007f82c63292e7inntevpque()from/u01/app/oracle/product/10.2.0/db_1/lib/libclntsh.so.10.1

#20x00007f82c6326aabinntevque()from/u01/app/oracle/product/10.2.0/db_1/lib/libclntsh.so.10.1

#30x00007f82c62fc81einnsevwait()from/u01/app/oracle/product/10.2.0/db_1/lib/libclntsh.so.10.1

#40x00000000004108d9innsglma()

#50x0000000000405abdinmain()

[oracle@DB-Server~]$