System Statistics Collection.

 All,
Database version: 10.2.0.3
OS: Solaris 10 x86-84

The system statistics collected on one of our databases was on 05-18-2008.

select pval2 from sys.aux_stats$ where sname = 'SYSSTATS_INFO' and pname = 'STATUS';
	

PVAL2
	

	
COMPLETED
	


select pname, pval1 from sys.aux_stats$ where sname = 'SYSSTATS_MAIN';
	

PNAME                               PVAL1
	

	
----------
	

CPUSPEED                             1641
	

CPUSPEEDNW                     1491.97518
	

IOSEEKTIM                              10
	

IOTFRSPEED                           4096
	

MAXTHR                              19456
	

MBRC                                   12
	

MREADTIM                           14.903
	

SLAVETHR
	

SREADTIM                            9.705
	

One of our DBA's wants to gather system statistics during a full workload.
its a production system and i am bit concerned about the performance impact after collecting statistics.

The Database block size is 8k and db_file_multiblock_read_count is set to 32 as per Application vendor requirements. We feels the MBRC value seems low with the above setting. it should be reading 256K. right?