Oracle进程与系统进程

--Oracle进程与系统进程

--------------------------2013/11/25

这里讨论Linux/Unix环境下，oracle v$process与操作系统对应的关系。

系统端：

[Oracle@localhost ~]$ ps -ef |head -1 ;ps -ef |grep ora |sort -r +1n -2 | grep -v grep

UID        PID  PPID  C STIME TTY          TIME CMD
Oracle    1108  2606  0 Nov23 ?        00:00:01 [oracle] <defunct>
Oracle    1125     1  0 Nov23 ?        00:00:11 ora_q001_august
Oracle    1167     1  0 Nov23 ?        00:01:02 ora_cjq0_august
Oracle    2578     1  0 Nov20 ?        00:01:27 ora_pmon_august
Oracle    2580     1  0 Nov20 ?        00:13:38 ora_vktm_august
Oracle    2584     1  0 Nov20 ?        00:00:11 ora_gen0_august
Oracle    2586     1  0 Nov20 ?        00:00:20 ora_diag_august
Oracle    2588     1  0 Nov20 ?        00:00:34 ora_dbrm_august
Oracle    2590     1  0 Nov20 ?        00:00:51 ora_psp0_august
Oracle    2592     1  0 Nov20 ?        00:01:37 ora_dia0_august
Oracle    2594     1  0 Nov20 ?        00:02:23 ora_mman_august
Oracle    2596     1  0 Nov20 ?        00:02:55 ora_dbw0_august
Oracle    2598     1  0 Nov20 ?        00:06:08 ora_lgwr_august
Oracle    2600     1  0 Nov20 ?        00:04:30 ora_ckpt_august
Oracle    2602     1  0 Nov20 ?        00:07:14 ora_smon_august
Oracle    2604     1  0 Nov20 ?        00:00:24 ora_reco_august
Oracle    2606     1  0 Nov20 ?        00:03:13 ora_mmon_august
Oracle    2608     1  0 Nov20 ?        00:01:52 ora_mmnl_august
Oracle    2610     1  0 Nov20 ?        00:00:17 ora_d000_august
Oracle    2612     1  0 Nov20 ?        00:00:22 ora_s000_august
Oracle    2637     1  0 Nov20 ?        00:05:12 ora_arc0_august
Oracle    2639     1  0 Nov20 ?        00:01:49 ora_arc1_august
Oracle    2641     1  0 Nov20 ?        00:00:42 ora_arc2_august
Oracle    2643     1  0 Nov20 ?        00:02:05 ora_arc3_august
Oracle    2645     1  0 Nov20 ?        00:00:19 ora_nsa2_august
Oracle    2649     1  0 Nov20 ?        00:00:25 ora_qmnc_august
Oracle    2800     1  0 Nov20 ?        00:00:25 ora_smco_august
Oracle   24302     1  0 05:20 ?        00:00:00 ora_q003_august
Oracle   24637 24635  0 05:35 ?        00:00:03 oracleaugust (DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))      *用户进程
Oracle   25010     1  0 06:00 ?        00:00:01 ora_w000_august

*如果想统计oracle进程在系统中的数量，可以这样： ps -ef | grep ora | wc -l (这里我的oracle用户名为Oracle，这样这条命令才可以过滤不相干的)

数据库端：

SQL> select spid,program from v$process order by spid;

SPID 　　　 PROGRAM
---------- ----------------------------------------
1125       oracle@localhost.localdomain (Q001)
1167       oracle@localhost.localdomain (CJQ0)
24302      oracle@localhost.localdomain (Q003)
24637      oracle@localhost.localdomain (TNS V1-V3)      *用户进程在v$process中
25010      oracle@localhost.localdomain (W000)
25335      oracle@localhost.localdomain (J000)
25337      oracle@localhost.localdomain (J001)
2578       oracle@localhost.localdomain (PMON)
2580       oracle@localhost.localdomain (VKTM)
2584       oracle@localhost.localdomain (GEN0)
2586       oracle@localhost.localdomain (DIAG)

SPID       PROGRAM
---------- ----------------------------------------
2588       oracle@localhost.localdomain (DBRM)
2590       oracle@localhost.localdomain (PSP0)
2592       oracle@localhost.localdomain (DIA0)
2594       oracle@localhost.localdomain (MMAN)
2596       oracle@localhost.localdomain (DBW0)
2598       oracle@localhost.localdomain (LGWR)
2600       oracle@localhost.localdomain (CKPT)
2602       oracle@localhost.localdomain (SMON)
2604       oracle@localhost.localdomain (RECO)
2606       oracle@localhost.localdomain (MMON)
2608       oracle@localhost.localdomain (MMNL)

SPID       PROGRAM
---------- ----------------------------------------
2610       oracle@localhost.localdomain (D000)
2612       oracle@localhost.localdomain (S000)
2637       oracle@localhost.localdomain (ARC0)
2639       oracle@localhost.localdomain (ARC1)
2641       oracle@localhost.localdomain (ARC2)
2643       oracle@localhost.localdomain (ARC3)
2645       oracle@localhost.localdomain (NSA2)
2649       oracle@localhost.localdomain (QMNC)
2800       oracle@localhost.localdomain (SMCO)
           PSEUDO

32 rows selected.

我们可以发现，是完全一致的，实际上spid字段表示，该process在操作系统中的进程号。

每多出一个用户连接：

Oracle   24637 24635  0 05:35 ?        00:00:03 oracleaugust (DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))
Oracle   25548 25547  0 06:32 ?        00:00:00 oracleaugust (DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))
Oracle   25572 25571  0 06:32 ?        00:00:00 oracleaugust (DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))
Oracle   25588 25587  1 06:32 ?        00:00:00 oracleaugust (DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))
Oracle   25605 25603 17 06:32 ?        00:00:01 oracleaugust (DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))

就多出一个Oracle服务器端进程：

24637 oracle@localhost.localdomain (TNS V1-V3)
25572      oracle@localhost.localdomain (TNS V1-V3)
25588      oracle@localhost.localdomain (TNS V1-V3)
25548      oracle@localhost.localdomain (TNS V1-V3)
25605      oracle@localhost.localdomain (TNS V1-V3)