Oracle sqlplus连接很慢

「爱情、让人受尽委屈。」 2022-07-17 04:51 405阅读 0赞

一个测试库上有很多个用户，其中的一个用户修改密码之后，就出现了连接缓慢的情况，而这个数据库上其他的用户连接没有问题。这种问题得先用strace跟踪一下：

strace -T -t -o /tmp/s.out sqlplus test/test

\-T  Show the time spent in system calls. This records the time difference between the beginning and the end of each system  call.  
\-o  Write the trace output to the file filename rather than to stderr.   
\-t  Prefix each line of the trace with the time of day.  
  
  
13:55:09 execve("/data1/oracle11g/product/11.2.0.4/db\_1/bin/sqlplus", \["sqlplus", "lcam\_zc\_0130/lcam\_zc\_pzgpassword"...\], \[/\* 32 vars \*/\]) = 0 <0.000364>  
13:55:09 brk(0)                         = 0x1ea1000 <0.000040>  
13:55:09 mmap(NULL, 4096, PROT\_READ|PROT\_WRITE, MAP\_PRIVATE|MAP\_ANONYMOUS, -1, 0) = 0x7f32071aa000 <0.000025>  
13:55:09 access("/etc/ld.so.preload", R\_OK) = -1 ENOENT (No such file or directory) <0.000044>  
13:55:09 open("/data1/oracle11g/product/11.2.0.4/db\_1/lib/tls/x86\_64/libsqlplus.so", O\_RDONLY) = -1 ENOENT (No such file or directory) <0.000025>  
13:55:09 stat("/data1/oracle11g/product/11.2.0.4/db\_1/lib/tls/x86\_64", 0x7fff3e3dacf0) = -1 ENOENT (No such file or directory) <0.000013>  
13:55:09 open("/data1/oracle11g/product/11.2.0.4/db\_1/lib/tls/libsqlplus.so", O\_RDONLY) = -1 ENOENT (No such file or directory) <0.000014>  
13:55:09 stat("/data1/oracle11g/product/11.2.0.4/db\_1/lib/tls", 0x7fff3e3dacf0) = -1 ENOENT (No such file or directory) <0.000012>  
13:55:09 open("/data1/oracle11g/product/11.2.0.4/db\_1/lib/x86\_64/libsqlplus.so", O\_RDONLY) = -1 ENOENT (No such file or directory) <0.000014>  
13:55:09 stat("/data1/oracle11g/product/11.2.0.4/db\_1/lib/x86\_64", 0x7fff3e3dacf0) = -1 ENOENT (No such file or directory) <0.000013>  
13:55:09 open("/data1/oracle11g/product/11.2.0.4/db\_1/lib/libsqlplus.so", O\_RDONLY) = 3 <0.000019>  
.........................  
13:55:10 write(10, "\\5z\\0\\0\\6\\0\\0\\0\\0\\0\\3s\\3\\376\\377\\377\\377\\377\\377\\377\\377\\f\\0\\0\\0\\1\\1\\0\\0\\376\\377\\377"..., 1402) = 1402 <0.000016>  
**13:55:10 read(11, "\\4\\222\\0\\0\\6\\0\\0\\0\\0\\0\\10\\31\\0\\23\\0\\0\\0\\23AUTH\_VERSION\_S"..., 8208) = 1170 <5.886348>**  
13:55:15 open("/data1/oracle11g/product/11.2.0.4/db\_1/rdbms/mesg/oraus.msb", O\_RDONLY) = 9 <0.000075>  
13:55:15 fcntl(9, F\_SETFD, FD\_CLOEXEC)  = 0 <0.000013>

很可惜，不知道这个是什么意思，因为有很多weblogic连到这个库上，weblogic有自动重连的机制，然后把weblogic连接池的密码都修改完后，sqlplus连接速度正常了。真是乱拳打死老师傅啊，问题解决了。