如何使用 prctl 命令显示给定资源控制的信息

• 显示正在运行的当前 shell 的最大文件描述符。

  # prctl -n process.max-file-descriptor $$
  
  
  
  
  
  
  
  process: 110453: -sh
  NAME    PRIVILEGE       VALUE    FLAG   ACTION       RECIPIENT
  process.max-file-descriptor
          basic             256       -   deny            11731
          privileged      65.5K       -   deny                 -
          system          2.15G     max   deny 
  

MORE INFO :? http://docs.oracle.com/cd/E26926_01/html/E25831/rmctrls.task-33.html

?

?

设置参数：(10G)

vi /etc/system

set noexec_user_stack=1
set semsys:seminfo_semmni=100
set semsys:seminfo_semmns=1024
set semsys:seminfo_semmsl=256
set semsys:seminfo_semvmx=32767
set shmsys:shminfo_shmmax=4294967295
set shmsys:shminfo_shmmin=1
set shmsys:shminfo_shmmni=100
set shmsys:shminfo_shmseg=10

重启root/

?

? 如下参数如果没有提示，就不需要修改//

?? * set hard limit on file descriptors
?? set rlim_fd_max = 4096
?? * set soft limit on file descriptors
?? set rlim_fd_cur = 1024

?

max_user_process

http://www.dbatoolz.com/t/11gr2-install-fails-hard-limit-maximum-user-processes.html

?

solaris问答：

http://www.uplooking.com/content/view/1626/

?

?

11G:///

Oracle Metalink was useless — total waste of time — I hate that site now, it’s gone completely into the crapper.

SOLUTION (thanks to David D’Acquisto advice):

1) edit /etc/system as follows:

set shmsys:shminfo_shmmax=12025908428
set shmsys:shminfo_shmmni=100
set shmsys:shminfo_shmseg=10
set semsys:seminfo_semmni=100
set semsys:seminfo_semmns=1024
set shmsys:shminfo_shmmin=1
set max_nprocs=30000
set maxuprc=16384

2) setup project for oracle user (if it’s already setup then just ignore the duplicate error while running projadd command):

projadd -U oracle user.oracle
projmod -s -K "project.max-sem-ids=(priv,100,deny)" user.oracle
projmod -s -K "process.max-sem-nsems=(priv,256,deny)" user.oracle
projmod -s -K "project.max-shm-memory=(priv,12025908428,deny)" user.oracle
projmod -s -K "project.max-shm-ids=(priv,100,deny)" user.oracle
projmod -s -K "process.max-file-descriptor=(priv,65536,deny)" user.oracle

3) bounce the box:

init 6

Here’s how to check for the setting:

## before above changes were applied
##
$ kstat|grep v_proc
??????? v_proc????????????????????????? 16362
$
?
$ kstat |grep v_maxup
??????? v_maxup???????????????????????? 16357
??????? v_maxupttl????????????????????? 16357
$
?
## after changes/reboot
##
?
$ kstat|grep v_proc
??????? v_proc????????????????????????? 30000
$
?
$ kstat |grep v_maxup
??????? v_maxup???????????????????????? 16384
??????? v_maxupttl????????????????????? 29995
$

NOTE: the setting above are based on 16gb of RAM if yours is less/more — adjust as per David’s formula.

No related posts.