/limits.confOraclebug引起的进程不够用-创新互联

今天在检查SMIDB的时候，发现CRS的告警日志中出现很多错误，具体为：

成都创新互联，为您提供成都网站建设、网站制作、网站营销推广、网站开发设计，对服务成都楼梯护栏等多个行业拥有丰富的网站建设及推广经验。成都创新互联网站建设公司成立于2013年,提供专业网站制作报价服务,我们深知市场的竞争激烈，认真对待每位客户，为客户提供赏心悦目的作品。 与客户共同发展进步，是我们永远的责任！

2015-08-19 17:12:21.745:

[/oracle/app/11.2.0/grid_1/bin/oraagent.bin(6227)]CRS-5013:Agent "/oracle/app/11.2.0/grid_1/bin/oraagent.bin" failed to start process "/oracle/app/11.2.0/grid_1/bin/lsnrctl" for action "check": details at "(:CLSN00008:)" in "/oracle/app/11.2.0/grid_1/log/smidb11/agent/crsd/oraagent_grid/oraagent_grid.log" 2015-08-19 17:13:09.986:  [/oracle/app/11.2.0/grid_1/bin/oraagent.bin(6227)]CRS-5013:Agent "/oracle/app/11.2.0/grid_1/bin/oraagent.bin" failed to start process "/oracle/app/11.2.0/grid_1/bin/lsnrctl" for action "check": details at "(:CLSN00008:)" in "/oracle/app/11.2.0/grid_1/log/smidb11/agent/crsd/oraagent_grid/oraagent_grid.log" 2015-08-19 17:13:21.758:  [/oracle/app/11.2.0/grid_1/bin/oraagent.bin(6227)]CRS-5013:Agent "/oracle/app/11.2.0/grid_1/bin/oraagent.bin" failed to start process "/oracle/app/11.2.0/grid_1/bin/lsnrctl" for action "check": details at "(:CLSN00008:)" in "/oracle/app/11.2.0/grid_1/log/smidb11/agent/crsd/oraagent_grid/oraagent_grid.log"

进一步跟踪日志发现：

2015-08-19 17:14:09.993: [ora.LISTENER.lsnr][1342174976]{1:63186:26462} [check] clsn_agent::check: Exception SclsProcessSpawnException 2015-08-19 17:14:21.744: [ora.asm][1342174976]{0:21:2} [check] CrsCmd::ClscrsCmdData::stat entity 1 statflag 33 useFilter 0 2015-08-19 17:14:21.759: [ora.asm][1342174976]{0:21:2} [check] AsmProxyAgent::check clsagfw_res_status 0 2015-08-19 17:14:21.761: [ora.LISTENER_SCAN1.lsnr][1339545344]{0:21:2} [check] Utils:execCmd action = 3 flags = 38 ohome = (null) cmdname = lsnrctl.  2015-08-19 17:14:21.761: [ora.LISTENER_SCAN1.lsnr][1339545344]{0:21:2} [check] (:CLSN00008:)Utils:execCmd scls_process_spawn() failed 1 2015-08-19 17:14:21.761: [ora.LISTENER_SCAN1.lsnr][1339545344]{0:21:2} [check] (:CLSN00008:) category: -2, operation: fork, loc: spawnproc28, OS error: 11, other: forked failed [-1] 2015-08-19 17:14:21.761: [ora.LISTENER_SCAN1.lsnr][1339545344]{0:21:2} [check] clsnUtils::error Exception type=2 string= CRS-5013: Agent "/oracle/app/11.2.0/grid_1/bin/oraagent.bin" failed to start process "/oracle/app/11.2.0/grid_1/bin/lsnrctl" for action "check": details at "(:CLSN00008:)" in "/oracle/app/11.2.0/grid_1/log/smidb11/agent/crsd/oraagent_grid/oraagent_grid.log"

ONS的日志：

[grid@smidb11 logs]$ tail ons.out  pthread_create() Resource temporarily unavailable pthread_create() Resource temporarily unavailable pthread_create() Resource temporarily unavailable pthread_create() Resource temporarily unavailable pthread_create() Resource temporarily unavailable pthread_create() Resource temporarily unavailable pthread_create() Resource temporarily unavailable pthread_create() Resource temporarily unavailable pthread_create() Resource temporarily unavailable [2015-05-07T03:09:22+08:00] [ons] [TRACE:2] [] [internal] ONS worker process stopped (0)

报这个错误说明是由于系统资源不足而导致的进程无法启动，检查ulimit设置

[grid@smidb11 logs]$ ulimit -u 10240

limit.conf

# End of file grid soft nproc 10240 grid hard nofile 65536 oracle soft nproc 10240 oracle hard nofile 65536

limit.conf配置有一些问题，没有配置hard  nproc 和 soft nofle，下周一重启前进行修正

[grid@smidb11 pam.d]$ cat login  #%PAM-1.0 auth [user_unknown=ignore success=ok ignore=ignore default=bad] pam_securetty.so auth       include      system-auth account    required     pam_nologin.so account    include      system-auth password   include      system-auth # pam_selinux.so close should be the first session rule session    required     pam_selinux.so close session    required     pam_loginuid.so session    optional     pam_console.so # pam_selinux.so open should only be followed by sessions to be executed in the user context session    required     pam_selinux.so open session    required     pam_namespace.so session    optional     pam_keyinit.so force revoke session    include      system-auth -session   optional     pam_ck_connector.so [grid@smidb11 pam.d]$

/etc/pam.d/login 文件没有添加资源限制模块，这里应该添加一行

session required /lib64/security/pam_limits.so

经过网上查找资料，发现Oracle MOS上面的一个文档，和我们的情况完全一致：

The processes and resources started by CRS (Grid Infrastructure) do not inherit the ulimit setting for "max user processes" from /etc/security/limits.conf setting (文档 ID 1594606.1)

通过验证，发现虽然我们的grid用户的ulimit -u已经设置为10240.但是实际运行的时候依然是1024.

这个是Oracle的一个Bug 17301761 ，我们的数据库版本是11.2.0.4,正好是这个bug的影响范围.

解决办法有两个,

1. 打补丁

2. 通过MOS给出的办法进行规避,如下:

The ohasd script needs to be modified to setthe ulimit explicitly for all grid and database resources that are started bythe Grid Infrastructure (GI).

1) go to GI_HOME/bin

2) make a backup of ohasd script file

3) in the ohasd script file, locate thefollowing code:

   Linux)
       # MEMLOCK limit is for Bug 9136459
       ulimit -l unlimited
       if [ "$?" != "0"]
       then
           $CLSECHO -phas -f crs -l -m 6021 "l" "unlimited"
       fi
       ulimit -c unlimited
       if [ "$?" != "0"]
       then
           $CLSECHO -phas -f crs -l -m 6021 "c" "unlimited"
       fi
       ulimit -n 65536

In the above code, insert the following linejust before the line with "ulimit -n 65536"

       ulimit -u 16384

4) Recycle CRS manually so that the ohasdwill not use new ulimit setting for open files.
After the database is started, please issue "ps -ef | grep pmon" andget the pid of it.
Then, issue "cat /proc//limits | grepprocess" and find out if the Max process is set to 16384.
Setting the number of processes to 16384 should be enough for most serverssince having 16384 processes normally mean the server to loaded veryheavily. using smaller number like 4096 or 8192 should also suffice formost users.
In addition to above, the ohasd template needs to be modified to insure thatnew ulimit setting persists even after a patch is applied.
1) go to GI_HOME/crs/sbs

2) make a backup of crswrap.sh.sbs

3) in crswrap.sh.sbs, insert the followingline just before the line "# MEMLOCK limit is for Bug 9136459"

       ulimit -u 16384
Finally, although the above setting is successfully used to increase the numberof processes setting, please test this on the test server first before settingthe ulimit on the production.

参考：http://blog.csdn.net/weiwangsisoftstone/article/details/42460585

另外有需要云服务器可以了解下创新互联cdcxhl.cn，海内外云服务器15元起步，三天无理由+7*72小时售后在线，公司持有idc许可证，提供“云服务器、裸金属服务器、高防服务器、香港服务器、美国服务器、虚拟主机、免备案服务器”等云主机租用服务以及企业上云的综合解决方案，具有“安全稳定、简单易用、服务可用性高、性价比高”等特点与优势，专为企业上云打造定制，能够满足用户丰富、多元化的应用场景需求。

名称栏目：/limits.confOraclebug引起的进程不够用-创新互联
本文URL：http://dzwzjz.com/article/dgechp.html