linux pstack命令总结

最新推荐文章于 2025-08-20 17:36:23 发布

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最新推荐文章于 2025-08-20 17:36:23 发布

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原文链接：http://www.cnblogs.com/kerrycode/p/5249968.html

本文介绍了pstack命令的使用方法及示例，展示了如何通过pstack命令获取进程的栈跟踪信息，帮助诊断进程挂起的问题。文章还提供了具体的案例，演示了如何使用pstack命令检查Oracle监听进程的状态。

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 ~]# man pstackPSTACK(1)                  Linux Programmer’s Manual                 PSTACK(1) NAME       pstack - print a stack trace of a running process SYNOPSIS       pstack pid DESCRIPTION       pstack  attaches  to  the active process named by the pid on the command line, and prints out an execution stack trace.  If ELF symbols exist in the binary (usually the case       unless you have run strip(1)), then symbolic addresses are printed as well.        If the process is part of a thread group, then pstack will print out a stack trace for each of the threads in the group. SEE ALSO       nm(1), ptrace(2), gdb(1) AUTHORS       Ross Thompson <ross@whatsis.com>        Red Hat, Inc. <http://bugzilla.redhat.com/bugzilla> Red Hat Linux                     Dec 17 2004                        PSTACK(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 | grep lsn oracle 12027 11806 0 11:18 pts/1 00:00:00 grep lsn oracle 31440 1 0 Mar04 ? 00:01:41 /u01/app/oracle/product/10.2.0/db_1/bin/tnslsnr LISTENER -inherit

2：将监听进程的栈跟踪信息写入文件lsn_pstack.log

[oracle@DB-Server~]$ pstack 31440 >> lsn_pstack.log [oracle@DB-Server~]$ pstack 31440 >> lsn_pstack.log [oracle@DB-Server~]$ pstack 31440 >> 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~]$ more lsn_pstack.log #0  0x0000003c7d0cb65f in poll () from /lib64/libc.so.6#1  0x00007f82c63292e7 in ntevpque () from /u01/app/oracle/product/10.2.0/db_1/lib/libclntsh.so.10.1#2  0x00007f82c6326aab in ntevque () from /u01/app/oracle/product/10.2.0/db_1/lib/libclntsh.so.10.1#3  0x00007f82c62fc81e in nsevwait () from /u01/app/oracle/product/10.2.0/db_1/lib/libclntsh.so.10.1#4  0x00000000004108d9 in nsglma ()#5  0x0000000000405abd in main ()#0  0x0000003c7d0cb65f in poll () from /lib64/libc.so.6#1  0x00007f82c63292e7 in ntevpque () from /u01/app/oracle/product/10.2.0/db_1/lib/libclntsh.so.10.1#2  0x00007f82c6326aab in ntevque () from /u01/app/oracle/product/10.2.0/db_1/lib/libclntsh.so.10.1#3  0x00007f82c62fc81e in nsevwait () from /u01/app/oracle/product/10.2.0/db_1/lib/libclntsh.so.10.1#4  0x00000000004108d9 in nsglma ()#5  0x0000000000405abd in main ()#0  0x0000003c7d0cb65f in poll () from /lib64/libc.so.6#1  0x00007f82c63292e7 in ntevpque () from /u01/app/oracle/product/10.2.0/db_1/lib/libclntsh.so.10.1#2  0x00007f82c6326aab in ntevque () from /u01/app/oracle/product/10.2.0/db_1/lib/libclntsh.so.10.1#3  0x00007f82c62fc81e in nsevwait () from /u01/app/oracle/product/10.2.0/db_1/lib/libclntsh.so.10.1#4  0x00000000004108d9 in nsglma ()#5  0x0000000000405abd in main ()[oracle@DB-Server~]$ 