Explain message in ADDM report

Question

Hi Experts,
I got some messages from ADDM as
1)23-JAN-09 PROBLEM 7203341 1 Application Analysis
Message : Wait event "SQL*Net more data from client" in wait clas
s "Network" was consuming significant database time.
Command To correct: UNDEFINED
Action Message : Investigate the cause for high "SQL*Net more data from
client" waits. Refer to Oracle's "Database Reference" for the description o
f this wait event.
2)
23-JAN-09 PROBLEM 7689364 2 Host Configuration
Message : The throughput of the I/O subsystem was significantly l
ower than expected.
Command To correct: UNDEFINED
Action Message : The performance of file G:\ORACLE\ORADATA\SALE\STREA
MS_TBS02.DBF was significantly worse than other files. If striping all file
s using the SAME methodology is not possible, consider striping this file o
ver multiple disks
07-JAN-09 PROBLEM 9025281 2 Host Configuration
Message : Waits on event "log file sync" while performing COMMIT
and ROLLBACK operations were consuming significant database time.
Command To correct: UNDEFINED
Action Message : Investigate the possibility of improving the performanc
e of I/O to the online redo log files
4)
16-JAN-09 PROBLEM 37542906 0 Segment Tuning
Message : Individual database segments responsible for significan
t user I/O wait were found.
Command To correct: UNDEFINED
Action Message : Investigate application logic involving I/O on TABLE "SALE_POSITION" with object id 93135.
plus as
PLAN_HASH 1025094865 INSERT /*+ BYPASS_RECURSIVE_CHECK */ INTO "SALE"."SALE_LAST_INPUT_CHANGE" SELECT LAST.ID, LAST.SENT_DATE_UTC, IO.IO_NUM, IO.STATUS FROM SALE_LAST_INPUT_BASE LAST, BASE BASE, POSITION POSITION, IO_STATUS IO WHERE POSITION.MSG_ID=BASE.MSG_ID AND LAST.PRDL_ID=BASE.ID SQL statement with SQL_ID "4s23dt29b0nx9" was executed 1 times and had an average elapsed time of 218 seconds.
Based on my understand,
Msg 1 means that have lots of application need to put into DB--waiting for
Msg 2 means i need to add more disk to hold datafile for that tablespace.
Msg 3 means that there are big/large transaction with commmit block.
Msg 4 means that lot of data insert inot database without commit;
From alert, I also got message as
*** ACTION NAME:(GATHER_STATS_JOB) 2009-01-27 22:05:55.754
*** MODULE NAME:(DBMS_SCHEDULER) 2009-01-27 22:05:55.754
*** SERVICE NAME:(SYS$USERS) 2009-01-27 22:05:55.754
*** SESSION ID:(303.6683) 2009-01-27 22:05:55.754
ORA-00054: resource busy and acquire with NOWAIT specified
*** 2009-01-27 22:05:55.848
GATHER_STATS_JOB: GATHER_TABLE_STATS('"SALE"','"SALE_LAST_INPUT_CHANGE"','""', ...)
ORA-00054: resource busy and acquire with NOWAIT specified
Plz help me to correct above message.
Thanks,
Jim

Answer 1

Hi,
AWR: Automatic Workload Repository
oracle take every 60 minutes a snapshot of statistic in memory and after analysed by ADDM ( automatic database diagnostic monitor) default option, but you can change every 10 minutes or ...
http://www.oracle-base.com/articles/10g/AutomaticWorkloadRepository10g.php
http://www.datadisk.co.uk/html_docs/oracle/addm.htm
http://www.rampant-books.com/t_andert_38_addm_awr_db.htm
http://www.remote-dba.net/oracle_10g_new_features/db_management.htm
http://www.sc.ehu.es/siwebso/KZCC/Oracle_10g_Documentacion/server.101/b10752/diagnsis.htm