Understanding 11g Alert log Messages

[kashif ashfaq]

hi all -- i hav 11g RAC environment, some messages in alert log are beyond comprehension like;

1. Wed Jul 08 22:11:50 2009
found dead shared server 'S054', pid = (100, 15) --though it doesnt affect any service

2. ORA-07445: exception encountered: core dump [kzvd_objprivCheck()+1264] [SIGSEGV] [ADDR:0x18] [PC:0x103AB43F0] [Address not mapped to object] []
Incident details in: /u01/app/oracle/diag/rdbms/grid3/grid31/incident/incdir_388228/grid31_s031_8059_i388228.trc

(how to read this .trc file, its in some pro-cosmic lang )

3. Wed Jul 08 22:42:59 2009
Sweep Incident[387936]: completed --whats a sweep incident?

these r commonly seen messages. in general, plz tell me how to make best use of alert log? what to see and how to react?
thanks in advance.

[PAVB]

Let me go backwards...

#3- Please check Metalink Doc ID: 750653.1
#2- A trace file has been a trace file since the beginning of the times; are these the first ones you ever seen?
#1- Couple of bugs described in Metalink, feel free to investigate further.

[kashif ashfaq]

Thanx for the attension, sir
i am new to this environment so plz dont mind silly questions..
i cud not understand the metalink advice.the docu id searched brought me back to my own thread. plz direct me cocisely.

[PAVB]

i cud not understand the metalink advice.the docu id searched brought me back to my own thread. plz direct me cocisely.

Search Metalink, not Google. You know, the Oracle support site.