oracle 起动错误
SQL> startup; ORA-27154: post/wait create failed ORA-27300: OS system dependent operation:semget failed with status: 28 ORA-27301: OS failure message: No space left on device ORA-27302: failure occurred at: sskgpsemsper
Cause of the problem
The error may mislead you. Though it indicates No space left on device but whenever I issue df -h on my OS there is enough space. The problem happened because of short of semaphores setting in the OS.
Solution of the problem
Solution 1)
Increase number of semaphores on operating system. You set semmns 32767 .
To make the setting permanent make an entry in /etc/sysctl.conf file on linux system.
sem = semmsl semmns semopm semmni
kernel.sem = 256 32768 100 228
Solution 2)
Change the initialization parameter processes to a lower one in the initialization file and then startup the database. In my initialization file processes was set to 555. Whenever I start my database it fails with above error. I then reduced it to by 55 and it started my database successfully.
g11@feb dbs]$ cat initg11.ora spfile=spfileg11.ora *.processes=50
问题解决
SQL> startup pfile=initg11.ora ORACLE instance started. Total System Global Area 3340451840 bytes Fixed Size 2217952 bytes Variable Size 1811941408 bytes Database Buffers 1509949440 bytes Redo Buffers 16343040 bytes Database mounted. Database opened.