sqlplus hang 长时间无响应 无法登陆 问题解决

现象：

数据库主机很慢，本地使用sqlplus / as sysdba 长时间无响应，

使用ps -ef | grep ora 后发现 cpu占用很高， 导致连接不上，

uptime 只有28天。

kill 所有oracle进程后，sqlplus 还是没有响应，甚至只运行sqlplus 也如此

解决办法：

1、重启可以解决

2、使用sqlplus -prelim / as sysdba

原因：

1：数据库内存溢出

2：SymptomsTrying to invoke SQL*Plus   hangs when machine uptime reaches 248 days.

SQL*Plus With Instant Client 10.2.0.1 Hangs, When System Uptime Is More Than 248 Days
metalink上的给出的答案是

Applies to: SQL*Plus - Version: 10.2.0.1.0
Linux x86
SymptomsTrying to invoke SQL*Plus   hangs when machine uptime reaches 248 days.

Database connection is not relevant as the 'sqlplus' executable itself hangs with or without connection information. It hangs regardless of what parameters are passed in.   For example:

sqlplus -V

However, the hang does not reproduce with Instant Client version 10.1.0.4

Generating a stack trace using gdb debugger shows:

#0 0x0048a0dd in times () from /lib/tls/libc.so.6
#1 0x01884599 in sltrgatime64 () from ./libclntsh.so.10.1
#2 0x0137d70f in kghinp () from ./libclntsh.so.10.1
#3 0x00f86b47 in kpuinit0 () from ./libclntsh.so.10.1
#4 0x00f85e7a in kpuenvcr () from ./libclntsh.so.10.1
#5 0x01051b5e in OCIEnvCreate () from ./libclntsh.so.10.1
#6 0x0099787e in afidrv () from ./libsqlplus.so
#7 0x009702b9 in safimTerminate () from ./libsqlplus.so
#8 0x0098c246 in afidrv () from ./libsqlplus.so
#9 0x080486f6 in main ()

Running STRACE tool shows:

$ strace /oracle/home/bin/sqlplus -V 2>&1 |less
......
old_mmap(NULL, 385024, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x41794000
gettimeofday({1122996561, 411035}, NULL) = 0
access("/usr/local/UD/conf/sqlnet.ora", F_OK) = -1 ENOENT (No such file or directory)
access("/usr/local/UD/lib/oracle/network/admin/sqlnet.ora", F_OK) = -1 ENOENT (No such file or directory)
access("/usr/local/UD/conf/sqlnet.ora", F_OK) = -1 ENOENT (No such file or directory)
access("/usr/local/UD/lib/oracle/network/admin/sqlnet.ora", F_OK) = -1 ENOENT (No such file or directory)
fcntl64(-1218313656, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
times(NULL) = -1825782405
times(NULL) = -1825782405
times(NULL) = -1825782405
times(NULL) = -1825782405
times(NULL) = -1825782405
times(NULL) = -1825782405
times(NULL) = -1825782405

It is looping on the times() function.

In addition to sqlplus, it has been reported that the netca and dbca tools also hang.

ChangesNew installation of Instant Client 10.2.0.1.0 on Linux platform. CauseThis is a known, unpublished bug.

Bug 4612267 OCI CLIENT IS IN AN INFINITE LOOP WHEN MACHINE UPTIME HITS 248 DAYS

SolutionSelect one of the following two solutions:

1) Apply one-off patch available for 10.2.0.1.
a. Download one-off patch off Metalink:
   Patch 4612267
   Description OCI CLIENT IS IN AN INFINITE LOOP WHEN MACHINE UPTIME HITS 248 DAYS
   Product CORE
   Release Oracle 10.2.0.1

b. To apply patch on Instant Client install, please follow instructions documented in the OCI manual.
       You can find this in:
       http://download.oracle.com/docs/cd/B19306_01/appdev.102/b14250/toc.htm

       under "Patching Instant Client Shared Libraries on Linux or UNIX".

2)   Wait for Patchset 10.2.0.2 to be available.
   According to Bug 4612267, this bug is fixed in version 11, and backported to 10.2.0.2 patchset.
   This patchset is estimated to be available mid-Dec 2005; but this is subject to change.