AWR报告简易分析

	Snap Id	Snap Time	Sessions	Cursors/Session
Begin Snap:	35669	2012-11-8 13:00	1246	11.3
End Snap:	35679	2012-11-8 18:00	834	16
Elapsed:		300.14
DB Time:		2,841.67
Operating System Statistics		Time Model Statistics
Statistic	Total	Statistic Name	Time (s)	% of DB Time
NUM_LCPUS	0	sql execute elapsed time	87,551.84	99.97
NUM_VCPUS	0	DB CPU	248.77	0.28
AVG_BUSY_TIME	126,487	parse time elapsed	2.76	0
AVG_IDLE_TIME	1,675,188	hard parse elapsed time	1.47	0
AVG_IOWAIT_TIME	2,687	failed parse elapsed time	0.45	0
AVG_SYS_TIME	11,000	PL/SQL execution elapsed time	0.84	0
AVG_USER_TIME	114,879	hard parse (sharing criteria) elapsed time	0.32	0
BUSY_TIME	48,496	hard parse (bind mismatch) elapsed time	14.16	0.01
IDLE_TIME	8,623,372	sequence load elapsed time	9.8	0.01
IOWAIT_TIME	7,728	repeated bind elapsed time	0.01	0
SYS_TIME	5,691	PL/SQL compilation elapsed time	2.03	0
USER_TIME	42,512	connection management call elapsed time	1.7	0
LOAD	0	inbound PL/SQL rpc elapsed time	0.02	0
OS_CPU_WAIT_TIME	7,404,200	DB time	87577.44
RSRC_MGR_CPU_WAIT_TIME	0	background elapsed time	1585.54
PHYSICAL_MEMORY_BYTES	135,319,207,936	background cpu time	206.8
NUM_CPUS	48
NUM_CPU_CORES	24
每个CPU耗时:=	DB Time/逻辑cpu个数	59.20	min
DB利用率:=	DB Time/(NUM_CPUS*Elapsed)*100%	19.72%		NUM_CPUS是逻辑cpu个数
CPU利用率:=	(DB CPU + background cpu time )/(NUM_CPUS*Elapsed )*100%	0.08%		NUM_CPUS是实际cpu个数
%User =	USER_TIME/(BUSY_TIME+IDLE_TIME)*100%	0.49%
%Sys  =	SYS_TIME/(BUSY_TIME+IDLE_TIME)*100%	0.07%
%Idle =	IDLE_TIME/(BUSY_TIME+IDLE_TIME)*100%	99.44%
ELAPSED_TIME=	(BUSY_TIME+IDLE_TIME)/1000	Elapsed*60*60
	8671.868	1080504.00
Service Statistics
ordered by DB Time
Service Name	DB Time (s)	DB CPU (s)	Physical Reads	Logical Reads
SYS$USERS	87,476.00	146.00	3,262	51,625
oradb11	101.00	102.00	0	545
SYS$BACKGROUND	0	0	1	26
Total DB Time	87577.0
Total DB Cpu	248.0
% DB Time	0.28%