Is there any way of increasing management point log file size  which are located under sms_ccm on management point box.

logs i want to change size are like

Mp_Locations

Policyevaluator

all the other ones which get filled so quickly and created another file .

Through service manager you can change log file size but these logs are not shown there which are under sms_ccm

Those logs should follow the size configured under HKLM\SOFTWARE\Microsoft\CCM\Logging\@Global: LogMaxSize. 

Many Thanks what would i change that to if i want 5mb size

The value is in bytes, thus 5 * 1024 * 1024 = 5242880 (decimal).

Many thanks for the help 

I have another question 

Our sccm runs really slow CPU is always running above 90% in peak time and collection evaluation and everything comes to hault.

I am working on reducing collection evaluation and schedulled to run out of hours.But i notices in logs they are far behind anything sometime schedulled to run in the evening runs in the morning .

Site rebuild index is set to run on wed between midnight but its running anytime is it trying to do last weeks as log size is very small so dont see much in that .

could you please advise 

There is a lot of information missing in order to help. How many clients are managed by ConfigMgr in total? Server hardware specs? OS/SQL config? How many collections etc.
Running the rebuild index maintenance task once a week is not enough. Run it daily or - even better - use Ola Hallengren's script instead. 

Ok we have one cas with 2 primary sites 

one primary site which is affected has 45000 ,1600 collections now down to 125 incremental and others are mostly scheduled to run out of business hours.

SCCM BOX IS DOOD PRIMARY SITE 

SQL BOX  64GB MEM WITH 16 CORE PROC RUNNING ALWAYS AT MOSTLY ABOVE 90%

INDEX REBUILD IS ALSO SET TO RUN DAILY ON SQL BOX NOW RECENTLY STILL PERFORMANCE IS NOT GETTING ANY BETTER .

REBUILD INDEX IN SCCM SITE IS SET TO RUN ONCE IN A WEEK BUT ITS LOG SHOWS RANDOM TIMES ITS RUNNING .