Good Morning Abhijit,
These are not something one can easly answer in 1 post. I would recommend going for the BASIS Academy for this.
1)Difference between client copy & client refresh?
http://www.saptechies.org/what-is-the-difference-between-a-client-copy-and-client-refr/
2)How to tuneup sap system?
http://scn.sap.com/thread/958133
3)If sap system is working slow then how to rectify the reason beyond of slowness?
http://scn.sap.com/thread/958133
4)What is the O/S parameter or SAP parameter & their functions?
this all depends on the Operating System version and database version please check on Service Market Place
0016 - DB2-z/OS: BW: DB settings and performance
5)what is the function of TP?
tp command is used to import transports
tp help
This is tp version 380.08.41 (release 720, unicode enabled)
usage: tp <command> [argument(s)] [option(s)], where <command> may be one of:
-----------------------------+-----------------------------+-------------------
Exporting I Buffer Actions I Disk Space
-----------------------------+-----------------------------+------------------
EXPORT I EXPWBO I ADDTOBUFFER I DELFROMBUFFERI CLEAROLD
R3E I VERSE I SETSYNCMARK I ADDSYNCMARK I DELSYNCMARK
CHECK I SDE I SETSTOPMARK I DELSTOPMARK I TESTOLD
TST I I MARK I UNMARK I
I I CLEANBUFFER I I
-----------------------------+-----------------------------+------------------
Importing I Special Functions I Information
-----------------------------+-----------------------------+------------------
PUT I I LOCKSYS I UNLOCKSYS I SHOWBUFFER
IMPORT I I LOCK_EU I UNLOCK_EU I COUNT
CMD I R3I I WRITELOG I GETPROTS I SHOWPARAMS
I I SAPSTART I SAPSTOP I GO
R3H I I GETTBATGENT I GETTRBATENT I CONNECT
ACT I MVKERNEL I GETDDXTTENT I GETDDXTFENT I CHECKIMPDP
SXPRA I SDI I GETOPENCORR I CREATECOFILE I SHOWINFO
GENTB I GENT1 I PREPAREBUFFERI CREATEINFO I GETOBJLIST
GENT2 I GEN I CONTP I EXPCHK I EXTRDOCU
DIST I XPA I SHOWSEMAPHOREI SHOWSEMACLIENI GETCONVENT
MVNTABS I VERSI I SETSEMAPHORE I DELSEMACLIENTI EXPLAINRC
IMPSYNC I DELIVER I DELSEMAPHORE I GETTPSTATENT I
DEPLOY I IMPORTPREVIEWI CHECKIN I CHECKINMOVE I CHECKOUT
CHECKDEPLOY I I I I
For more details call tp with the desired command (and no other parameters)
6)why need to require sap kernel of spam update?
add the improvements developed by SAP
7)what is the function of message server?
source : comes out of the basis manual
TheMessage Server (MS) handles communication between the distributed
dispatchers within the AS ABAP, thereby enabling scalability of several
parallel application servers. The message server is configured only once
per SAP system.
8)what is the best percentage of database and buffer?
again depends on OS version an DB version
1086130 - DB6: DB2 9.5 Standard Parameter Settings
9)by using the tcode st02, then find red color in some buffer area. why is it showing & how to do then?
you can double click on the red ones and get the parameter names and search on SMP
10)how can i justify that sap system is working fine. what are those process need to be justified in this regards?
you can use a basis checklist to check the system and make sure there are no errors etc.
http://scn.sap.com/docs/DOC-18590
- Search before you post. There are many answered questions and helpful postings already in SCN. Before posting a new question, please search SCN to see if it’s already been asked / answered. That’s the fastest way to get your information.
Best Regards
Marius
