通过系统的topas 查询消耗过高的进程：
CPU User% Kern% Wait% Idle% Reads 4221 Rawin 0 ALL 73.3 4.0 0.0 22.7 Writes 1286 Ttyout 1693 Forks 5 Igets 0 Network KBPS I-Pack O-Pack KB-In KB-Out Execs 5 Namei 593 Total 26.2K 15.0K 14.1K 13.3K 12.9K Runqueue 41.5 Dirblk 0 Waitqueue 0.0 Disk Busy% KBPS TPS KB-Read KB-Writ MEMORY Total 0.3 15.1K 1640.0 2744.7 12.4K PAGING Real,MB 163840 Faults 756 % Comp 32 FileSystem KBPS TPS KB-Read KB-Writ Steals 0 % Noncomp 4 Total 1.4K 2.8K 1.3K 0.7 PgspIn 0 % Client 4 PgspOut 0 Name PID CPU% PgSp Owner PageIn 0 PAGING SPACE oracle 11534438 54.2 11.3 opcore PageOut 0 Size,MB 32768 oracle 2163230 1.3 9.1 opcore Sios 0 % Used 0 oracle 4653672 0.7 9.1 opcore % Free 100查询v$process 查看addr和消耗的pga:
SQL> select SPID,pid,addr,PGA_USED_MEM,PGA_ALLOC_MEM,PGA_FREEABLE_MEM,PGA_MAX_MEM from gv$process where spid in (11534438); SPID PID ADDR PGA_USED_MEM PGA_ALLOC_MEM PGA_FREEABLE_MEM PGA_MAX_MEM ---------- ---------- ---------------- ------------ ------------- ---------------- ----------- 11534438 133 07000008E33BF110 4511361 5920049 1048576 6247729通过 spid 查询sid，
select s.sid,p.spid from v$session s,v$process p where s.paddr=p.addr and p.spid=11534438; SID SPID ---------- ---------- 2059 11534438通过sid查询sql_text
SQL> select sql_text from v$session s,v$sqltext q where s.sql_hash_value =q.hash_value and s.sql_address=q.address and s.sid=2059; SQL_TEXT ------------------------------------------------------------------------------------------------------------------------ call cbsd_coordinator.startexecute( :1 , :2 )最后可见， cbsd_coordinator.startexecute( :1 , :2 )存在大量消耗CPU的问题。
文章来源: AIX 系统CPU消耗过高诊断过程