如果ORACLE已经连接不上如果产生一个数据库级别的systemstate dump文件
背景
如果当你已经无法正常连接到oracle时，可能数据库此时已经hang,通过sqlplus -prelim '/as sysdba'也无法登陆数据库，可以通过操作系统级别的工具产生oracle systemstate dump文件，进行数据库的全面分析与诊断
结论
1,数据库无法进入或HANG时，可能过gdb产生ORACLE的SYSTEMSTATE DUMP文件2,LINUX操作系统，ORACLE11G
3,在unix请使用dbx
测试
1,产生一个测试远端会话[oracle@seconary ~]$ sqlplus scott/system@guowang
[oracle@seconary admin]$ ps -ef|grep LOCAL
oracle 17446 1 0 04:28 ? 00:00:00 oracleguowang (LOCAL=NO)
oracle 17545 8032 0 04:28 pts/0 00:00:00 grep LOCAL
2，用GDB跟踪这个远端会话
[oracle@seconary ~]$ gdb $ORACLE_HOME/bin/oracle 17446
GNU gdb Fedora (6.8-37.el5)
Copyright (C) 2008 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-redhat-linux-gnu"...
(no debugging symbols found)
Attaching to program: /oracle/product/11.2.0/db_1/bin/oracle, process 17446
Reading symbols from /oracle/product/11.2.0/db_1/lib/libodm11.so...(no debugging symbols found)...done.
Loaded symbols for /oracle/product/11.2.0/db_1/lib/libodm11.so
Reading symbols from /oracle/product/11.2.0/db_1/lib/libcell11.so...(no debugging symbols found)...done.
Loaded symbols for /oracle/product/11.2.0/db_1/lib/libcell11.so
Reading symbols from /oracle/product/11.2.0/db_1/lib/libskgxp11.so...(no debugging symbols found)...done.
Loaded symbols for /oracle/product/11.2.0/db_1/lib/libskgxp11.so
Reading symbols from /lib64/librt.so.1...(no debugging symbols found)...done.
Loaded symbols for /lib64/librt.so.1
Reading symbols from /oracle/product/11.2.0/db_1/lib/libnnz11.so...(no debugging symbols found)...done.
Loaded symbols for /oracle/product/11.2.0/db_1/lib/libnnz11.so
Reading symbols from /oracle/product/11.2.0/db_1/lib/libclsra11.so...done.
Loaded symbols for /oracle/product/11.2.0/db_1/lib/libclsra11.so
Reading symbols from /oracle/product/11.2.0/db_1/lib/libdbcfg11.so...done.
Loaded symbols for /oracle/product/11.2.0/db_1/lib/libdbcfg11.so
Reading symbols from /oracle/product/11.2.0/db_1/lib/libhasgen11.so...done.
Loaded symbols for /oracle/product/11.2.0/db_1/lib/libhasgen11.so
Reading symbols from /oracle/product/11.2.0/db_1/lib/libskgxn2.so...done.
Loaded symbols for /oracle/product/11.2.0/db_1/lib/libskgxn2.so
Reading symbols from /oracle/product/11.2.0/db_1/lib/libocr11.so...done.
Loaded symbols for /oracle/product/11.2.0/db_1/lib/libocr11.so
Reading symbols from /oracle/product/11.2.0/db_1/lib/libocrb11.so...done.
Loaded symbols for /oracle/product/11.2.0/db_1/lib/libocrb11.so
Reading symbols from /oracle/product/11.2.0/db_1/lib/libocrutl11.so...done.
Loaded symbols for /oracle/product/11.2.0/db_1/lib/libocrutl11.so
Reading symbols from /oracle/product/11.2.0/db_1/lib/libasmclnt11.so...done.
Loaded symbols for /oracle/product/11.2.0/db_1/lib/libasmclnt11.so
Reading symbols from /usr/lib64/libaio.so.1...done.
Loaded symbols for /usr/lib64/libaio.so.1
Reading symbols from /lib64/libdl.so.2...done.
Loaded symbols for /lib64/libdl.so.2
Reading symbols from /lib64/libm.so.6...done.
Loaded symbols for /lib64/libm.so.6
Reading symbols from /lib64/libpthread.so.0...done.
[Thread debugging using libthread_db enabled]
[New Thread 0x2ab13e44ae80 (LWP 17446)]
Loaded symbols for /lib64/libpthread.so.0
Reading symbols from /lib64/libnsl.so.1...done.
Loaded symbols for /lib64/libnsl.so.1
Reading symbols from /lib64/libc.so.6...print
done.
Loaded symbols for /lib64/libc.so.6
Reading symbols from /lib64/ld-linux-x86-64.so.2...done.
Loaded symbols for /lib64/ld-linux-x86-64.so.2
Reading symbols from /lib64/libnss_files.so.2...done.
Loaded symbols for /lib64/libnss_files.so.2
Reading symbols from /oracle/product/11.2.0/db_1/lib/libnque11.so...done.
Loaded symbols for /oracle/product/11.2.0/db_1/lib/libnque11.so
Reading symbols from /lib64/libnss_dns.so.2...done.
Loaded symbols for /lib64/libnss_dns.so.2
Reading symbols from /lib64/libresolv.so.2...done.
Loaded symbols for /lib64/libresolv.so.2
0x0000003d5660d590 in __read_nocancel () from /lib64/libpthread.so.0
(gdb)
(gdb)
(gdb) print
The history is empty.
3，在GDB界面输入如下命令，即print ksudss(10)
(gdb) print ksudss(10)
$1 = 0
4,退出GDB界面，先输入QUIT后输入Y
(gdb) quit
The program is running. Quit anyway (and detach it)? (y or n) y
Detaching from program: /oracle/product/11.2.0/db_1/bin/oracle, process 17446
[oracle@seconary ~]$
5，在USER_DUMP_DEST获取上述产生的SYSTEMSTATE DUMP文件
SQL> show parameter user_dump
NAME TYPE VALUE
------------------------------------ ---------------------- ------------------------------
user_dump_dest string /oracle/diag/rdbms/guowang/guo
wang/trace
[oracle@seconary ~]$ cd /oracle/diag/rdbms/guowang/guowang/trace
[oracle@seconary trace]$ ls -l *17446*
-rw-r----- 1 oracle oinstall 3036048 Oct 17 04:31 guowang_ora_17446.trc
[oracle@seconary trace]$ more guowang_ora_17446.trc
Trace file /oracle/diag/rdbms/guowang/guowang/trace/guowang_ora_17446.trc
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
ORACLE_HOME = /oracle/product/11.2.0/db_1
System name: Linux
Node name: seconary
Release: 2.6.18-164.el5
Version: #1 SMP Tue Aug 18 15:51:48 EDT 2009
Machine: x86_64
Instance name: guowang
Redo thread mounted by this instance: 1
Oracle process number: 74
Unix process pid: 17446, image: oracle@seconary
*** 2015-10-17 04:30:54.862
*** SESSION ID:(211.52312) 2015-10-17 04:30:54.862
*** CLIENT ID:() 2015-10-17 04:30:54.862
*** SERVICE NAME:(guowang) 2015-10-17 04:30:54.862
*** MODULE NAME:(SQL*Plus) 2015-10-17 04:30:54.862
*** ACTION NAME:() 2015-10-17 04:30:54.862
===================================================
SYSTEM STATE (level=10)
------------
System global information:
processes: base 0xdd51ae00, size 1000, cleanup 0xdd59fc40
allocation: free sessions 0xdd9b40d0, free calls (nil)
control alloc errors: 0 (process), 0 (session), 0 (call)
PMON latch cleanup depth: 0
seconds since PMON's last scan for dead processes: 25
system statistics:
0 OS CPU Qt wait time
--More--(0%)
参考资料
Performance Tools Quick Reference Guide (文档 ID 438452.1)
How to Collect Systemstate Dumps When you Cannot Connect to Oracle
(121779.1)
How to Capture a Systemstate Dump Using GDB Utility on Linux(374569.1)
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