Siemens SM2 monitoring system, U3585-J-Z125-8-76 1 manual PCA Cache report SM2 reports

PCA CACHE report SM2 reports

PCA CACHE report

This report provides monitored data on the caches of selected controllers.

Report output

The PCA CACHE report is output only at the explicit request of the SM2 user with the help of the SELECT-PCA-CONTROLLER statement (see page 176). This statement is used to output a PCA CONTROLLER report together with a PCA CACHE report for the selected controllers. The PCA CACHE report supplies detailed information on the controller caches. The report can only be output if the SM2 administrator has activated the monitoring process using the statement START-MEASUREMENT-PROGRAM TYPE=*PCA.

Overflow screens may be requested for this report.

The monitored data output is sorted in accordance with the size of the cache (CACHE SIZE). It is possible to output data on up to 32 controllers.

	D017ZE03 SM2 PCA CACHE								CYCLE:		60 S				99-03-24		11:11:02
				CTL-DEV-MN: A93F
	----+			+		+		+		+		+	+		+		+
			-----		-------		--------		--------		--------			--------
	CACHCACHE				PREF. #PEND.				READ	C-READ		READ-	WRITE		FAST W.		C-OVER
	ID	SIZE			LEN.	BLOCKS			(1/S)	(1/S)		H-R. % (1/S)			(1/S)			(1/S)
	----+		-----	+	-------	+--------		+	--------	+--------		+------	+	--------	+	--------	+	--------
5			20		0		594		324.8		324.8	100.0		178.0		178.0		0.0
4			4		16		0		0.0		0.0	0.0		0.0		0.0		0.0
----+			-----	+	-------	+--------		+	--------	+--------		+------	+	--------	+	--------	+	--------

Monitoring information

CTL-DEV-MN	Mnemonic name of the controller’s CONTROL DEVICE
CACH ID	Cache ID
CACHE SIZE	Size of the cache in MB
PREF. LEN.	Prefetch length for high-speed caching reads in input/output opera-
	tions
#PEND. BLOCKS	Number of blocks (2Kb/4Kb, depending on the disk format) still to be
	relocated to disk
READ (1/S)	Total number of read operations (in I/Os per second)
C-READ (1/S)	Total number of read operations to be executed as fast reads
	(caching reads) (in I/Os per second)

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