Switch logs

Question

hey gurus
i have a database on oracle 9.2. i have created two standby out of it .and both are in managed recovery.ths database has sufficient space of it's requirement . Good space for datafile to grow and good space for archive logs. but the strange problem i'm facing is when ever i run command
alter system switch logfile;
it takes more then 3 or 4 hrs. and also i never find any error in ALERT FILE .
there are also many other databases with diff version running on that server and having no problem in switch logs ..
can any body discuss and define why this is happening

Answer 1

by 3 4 hour i mean when ever we execute this command
alter system switch logfile;
it show no activity at all .like it's hang which it is not .it stays in same ondition for 3 4 hours and then switches log ,
here are the results from all the querys
SQL> SELECT PROCESS, STATUS, THREAD#, SEQUENCE#, BLOCK#, BLOCKS 2> FROM V$MANAGED_STANDBY;
PROCESS STATUS THREAD# SEQUENCE# BLOCK# BLOCKS
ARCH CLOSING 1 24230 1 1
ARCH CLOSING 1 24229 1 3
SELECT RECOVERY_MODE FROM V$ARCHIVE_DEST_STATUS ;
RECOVER
IDLE
MANAGED
MANAGED
IDLE
IDLE
IDLE
IDLE
IDLE
IDLE
IDLE
SQL> SELECT ARCHIVED_THREAD#, ARCHIVED_SEQ#, APPLIED_THREAD#, APPLIED_SEQ# 2> FROM V$ARCHIVE_DEST_STATUS;
ARCHIVED_THREAD# ARCHIVED_SEQ# APPLIED_THREAD# APPLIED_SEQ#
1 24230 0 0
1 24230 1 24228
1 24230 1 24228
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
no error in alert log file
no arror in and trace file
tnsping is working perfectly fine
( some time this command switch log file instantanously and at that time archive logs are getting trasferred to standby location)
No cron job is running on this database
only 40 gb is n size and very very less activity
select event, sum(WAIT_TIME), count(*) from v$session_wait group by event order by 2
EVENT SUM(WAIT_TIME) COUNT(*)
rdbms ipc message 0 6
smon timer 0 1
switch logfile command 0 1
can any body suggest something any clue in this regard
Message was edited by:
closetodestination
Message was edited by:
closetodestination