怎么解决启动Oracle报错ORA-27102问题

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1. SQL> startup pfile='/u01/oracle/product/11gr2/db_home/dbs/initerp.ora'
   

2. ORA-27102: out of memory
   

3. Linux-x86_64 Error: 28: No space left on device
   

4. 
   

5. # 报错原因
   

6. # 查看内核参数配置文件，发现关于内存的内核参数被修改成很小的值，这个值远远低于数据库SGA、PGA内存参数设置的值；进而导致数据库无法启动。
   

7. $ cat sysctl.conf
   

8. # Controls the maximum shared segment size, in bytes
   

9. kernel.shmmax = 68719476736
   

10. 
    

11. # Controls the maximum number of shared memory segments, in pages
    

12. kernel.shmall = 4294967296
    

13. 
    

14. 
    

15. fs.aio-max-nr = 1048576
    

16. fs.file-max = 6815744
    

17. kernel.shmmax = 536870912
    

18. net.ipv4.ip_local_port_range = 9000 65500
    

19. kernel.shmall = 2097152
    

20. kernel.shmmax = 2147483648
    

21. 
    

22. # 解决方法
    

23. # 注释掉错误的参数，重新刷新内核参数
    

24. [root@erp2 ~]# sysctl -p
    

25. net.ipv4.ip_forward = 0
    

26. net.ipv4.conf.default.rp_filter = 1
    

27. net.ipv4.conf.default.accept_source_route = 0
    

28. kernel.sysrq = 0
    

29. kernel.core_uses_pid = 1
    

30. net.ipv4.tcp_syncookies = 1
    

31. kernel.msgmnb = 65536
    

32. kernel.msgmax = 65536
    

33. kernel.shmmax = 68719476736
    

34. kernel.shmall = 4294967296
    

35. fs.aio-max-nr = 1048576
    

36. fs.file-max = 6815744
    

37. net.ipv4.ip_local_port_range = 9000 65500
    

38. kernel.shmmni = 4096
    

39. kernel.sem = 250 32000 100 128
    

40. net.core.rmem_default = 262144
    

41. net.core.rmem_max = 4194304
    

42. net.core.wmem_default = 262144
    

43. net.core.wmem_max = 1048576
    

44. 
    

45. SQL> startup pfile='/u01/oracle/product/11gr2/db_home/dbs/initerp.ora'
    

46. ORACLE instance started.
    

47. 
    

48. Total System Global Area 1.0689E+10 bytes
    

49. Fixed Size            2216344 bytes
    

50. Variable Size         1946160744 bytes
    

51. Database Buffers     8724152320 bytes
    

52. Redo Buffers           16945152 bytes
    

53. Database mounted.
    

54. Database opened.
    

55. SQL> shutdown immediate
    

56. Database closed.
    

57. Database dismounted.
    

58. ORACLE instance shut down.

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