RE: URGENT!!! My 9i databases are not shutting down

Tanel,  

It is more like 'two is company, three is a crowd'. The 'sync; sync; sync' was used in the days of yore when the disk controller was flaky and you had a few seconds of 'think time' on your hand in between commands. As Hemant says, it became a habit which still dogs me after 19 years - I have my (younger) colleagues here asking 'what is sync'?  

This was far better than my initial days when we used 8" AC Floppy drives whose speed varied with the electricity supply frequency and we had to use a frequency meter to note down the frequency during a floppy recording. [Btw - the term 'floppy' came from this media which was a flexible plastic based magnetic disk enclosed in a flexible - floppy - cover. And there was a 5 1/4" version before it finally became the 3 1/2" 'firm' disk]. I also worked on card punch IBM machines with 64 Kb RAM and 2 Mb (that right 2 MB!) system drives.  

Now back to Oracle stuff before Jared bears down on us :)  

John  

 -----Original Message-----
Sent: Thursday, August 21, 2003 9:19 AM
To: Multiple recipients of list ORACLE-L

Habit. The "sync" command is picked up by the scheduler "sched" and may not be executed immediately.
With three "sync" calls, at least one goes through by the time you are ready to type in "shutdown" or "init 0"

Hemant
At 08:04 AM 21-08-03 -0800, you wrote:

Hi!  

I've always wondered why 3 syncs. Is it quaranteed, that after *exactly 3* syncs everything has been written to disk? Or it more like that after that number of syncs, most of the changes should be on disk? (sounds stupid)  

Tanel.

• Original Message -----

To: Multiple recipients of <mailto:ORACLE-L_at_fatcity.com> list ORACLE-L

Sent: Thursday, August 21, 2003 12:04 AM

I'd suggest throwing a couple ALTER SYSTEM CHECKPOINT commands just prior to the SHUTDOWN ABORT, to help speed up the subsequent STARTUP (and just to make me feel better)...

Does anyone remember the UNIX mantra of entering "sync; sync; sync" before "halt"? :-)

on 8/20/03 11:09 AM, April Wells at awells_at_csedge.com
<mailto:awells_at_csedge.com> wrote:

We have started waiting 90 min then do shutdown abort, startup, shutdown immediate

April Wells

Oracle DBA/Oracle Apps DBA

Corporate Systems

Amarillo Texas

Few people really enjoy the simple pleasure of flying a kite

Adam Wells age 11

-----Original Message-----

<mailto:Paula_Stankus_at_doh.state.fl.us> ]

Sent: Wednesday, August 20, 2003 12:54 PM

To: Multiple recipients of list ORACLE-L

Which brings up that thread of - if they are hard to shutdown and possibly going to crash anyway then ..... why not just wait some period of time and do the old shutdown abort.

-----Original Message-----

Sent: Wednesday, August 20, 2003 1:00 PM

To: Multiple recipients of list ORACLE-L

We do, Paula... both in 9.0.1.3 and 9.2.0.2 we have trouble getting them to shutdown elegantly... and they sometimes crash

April Wells

Oracle DBA/Oracle Apps DBA

Corporate Systems

Amarillo Texas

Few people really enjoy the simple pleasure of flying a kite

Adam Wells age 11

-----Original Message-----

<mailto:Paula_Stankus_at_doh.state.fl.us> ]

Sent: Wednesday, August 20, 2003 11:50 AM

To: Multiple recipients of list ORACLE-L

BTW, nothing happening in terms of processes that would hang-up the system. Also, I have check alert and trace files and there are no obvious errors.

-----Original Message-----

<mailto:Paula_Stankus_at_doh.state.fl.us> ]

Sent: Wednesday, August 20, 2003 12:25 PM

To: Multiple recipients of list ORACLE-L

There seems to be a problem with consistent shutdowns in 9i

Oracle 9i 64bit

9.0.1.3.0 - infrastructure database that comes with the application server

9.2.0.1.0 - that is the version of RDBMS we are running.

Does anyone have problems shutting down their databases consistently with 9i?????

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<http://hkchital.tripod.com/>

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