V$ACCESS This view shows objects in the database that are currently locked and the sessions that are accessing them
V$ACTIVE_INSTANCES This view maps instance names to instance numbers for all instances that have the database currently mounted.
V$ARCHIVE This view contains information on archive logs for each thread in the database system. Each row provides information for one thread.
V$BGPROCESS This view describes the background processes.
Concurrent managers tuning
-PMON, QUEUE SIZE, SLEEP TIME
- Purging Concurrent Request
-adjusting concurrent manager cache size
-Analyzing Oracle Apps Dictionary Tables for High Performance
PMON cycle->waits between the time it checks for failed managers
QUEUE Size->no. of PMOn cycles the ICM waits to check for new CM or the disabled CM's
SLEEP Time-> no. of sec the ICM waits for the checking the request to be run
Purging concurrent request
Purging these two tables
-> FND_CONCURRENT_PROCESS
-> FND_CONCURRENT_REQUESTS
( should not exceed 50k )
Gather table stat for
FND_CONCURRENT_PROCESSES
FND_CONCURRENT_PROGRAMS
FND_CONCURRENT_REQUESTS
FND_CONCURRENT_QUEUES.
Purge obsolete workflow runtime data as sysadmin
##gather schema stat
as sysadmin ->run-> gather schema stat%
as sysadmin ->run-> gather table stat%
form issues --> help -> diag->trace with binds
concurrent manager issues->
profile option -> allow debugging-> set profile yes
Database Tuning
Wait
Events for 11g
v$session
v$waitclassmetric
v$waitclassmetric_history
v$waitstat
v$wait_chains
Oracle
11g Concurrency and SQL Tuning
v$lock
v$sql
v$sqlarea
v$sesstat
v$mystat
v$sess_io
v$sysstat
v$statname
v$osstat
v$active_session_history
v$active_sess_pool_mth
v$session_wait
v$session_wait_class
v$system_wait_class
v$transaction
v$locked_object
v$latch
v$latch_children
v$latch_parent
v$latchname
v$latchholder
v$latch_misses
v$enqueue_lock
v$transaction_enqueue
v$sys_optimizer_env
v$ses_optimizer_env
v$sql_optimizer_env
v$sql_plan
v$sql_plan_statistics
v$sql_plan_statistics_all