How can I do when tempdb is full of space?

Hi,

Is there no way except shutdown with nowait when tempdb is full?
tempdb is full of space when some users often send a wrong query to server
by mistake.
Whenever tempdb is full, I have to shutdown the server with nowait.
and after shutdown the server, the value of identity column is always jump
up when new row is inserted.
Any ideas will be appreciated.
Thanks.


0
news
10/8/2002 11:55:10 AM
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Have you tried the "abort tran on log full" database option on tempdb?

Also ASE 12.5.0.1 has a feature under the Resource Governor to limit the
amount of tempdb space a user may use, it sounds like it
would address your problem.

-bret


"news.nuri.net" wrote:
> 
> Hi,
> 
> Is there no way except shutdown with nowait when tempdb is full?
> tempdb is full of space when some users often send a wrong query to server
> by mistake.
> Whenever tempdb is full, I have to shutdown the server with nowait.
> and after shutdown the server, the value of identity column is always jump
> up when new row is inserted.
> Any ideas will be appreciated.
> Thanks.
0
Bret
10/8/2002 2:04:10 PM
> Is there no way except shutdown with nowait when tempdb is full?
> tempdb is full of space when some users often send a wrong query to 
server
> by mistake.
> Whenever tempdb is full, I have to shutdown the server with nowait.
> and after shutdown the server, the value of identity column is always 
jump
> up when new row is inserted.
> Any ideas will be appreciated.

Turn on 'abort tran on log full' in tempdb & model so that the offending 
process will automatically die.

mc

0
mc
10/8/2002 2:28:33 PM
I have found quite often the offending task has created a large work table 
which allocates space in the system area. In this case 'abort tran on log 
full' will not work. I also used to shut the system down for a tempdb full 
condition. I now run a cron job that issues an sp_who and 'select * from 
master..syslogshold' every 5 minutes which builds all day and is cleared 
and started over each morning. From this I can identify the offending task 
and kill it. This has never failed to clear the situation. ( The cron job 
will quit working when tempdb fills so you will look at the intervals 
previously captured. First look at the syslogshold output for a task with 
dbid = 2. This is a likely offender and should be cancelled if a user task. 
Next look for spids in running or sleeping states. Depending on your 
environment this should be a handful of tasks at any given moment. Use some 
deductive reasoning to determine the culprit. (Killing a couple of the 
wrong tasks is preferable to taking the server down.)
0
smspears
10/8/2002 7:14:50 PM
Hi,

You can always extend the tempdb size if it runs out of space
and you have space on your tempdb devices.

Thanks,
Deven
0
Dev
10/8/2002 9:11:22 PM
"news.nuri.net" <lee> wrote in message
news:WglakJsbCHA.288@forums.sybase.com...
> Hi,
>
> Is there no way except shutdown with nowait when tempdb is full?
> tempdb is full of space when some users often send a wrong query to
server
> by mistake.
> Whenever tempdb is full, I have to shutdown the server with nowait.
> and after shutdown the server, the value of identity column is always
jump
> up when new row is inserted.
> Any ideas will be appreciated.
> Thanks.
>

There is no need to shutdown the server when tempdb is full. Just run this
statement:

   select lct_admin("abort", 0, 2)

.... this will abort the transactions which have filled up tempdb.

You may want to set the dboption "abort tran on log full" for tempdb (using
'sp_dboption') -- this will save time because transactions will then be
aborted automatically when tempdb fills up.

HTH,

Rob
-------------------------------------------------------------
Rob Verschoor

Certified Sybase Professional DBA for ASE 12.5/12.0/11.5/11.0

Author of "The Complete Sybase ASE Quick Reference Guide"
Online orders accepted at http://www.sypron.nl/qr

mailto:rob@DO.NOT.SPAM.sypron.nl.REMOVE.THIS.DECOY
http://www.sypron.nl
Sypron B.V., P.O.Box 10695, 2501HR Den Haag, The Netherlands
-------------------------------------------------------------

0
Rob
10/8/2002 9:24:38 PM
Most of the solutions presented here assume tempdb is full due to log 
space. My experience has been that often the suspend will be for the system 
segment (work tables) in which case you must find and kill the offending 
spid.
0
smspears
10/9/2002 12:22:53 PM
Sometimes you  reach a level where you cant run select *
from sysprocess (at isolation 0) or select * from syslogshold
or sp_who or any other SP. So you cannot find out which processes
is filling up space

You are left with only 2 options if log segment is not full (system or 
default)

1)alter database tempdb on ...

2) shutdown with no_wait.

I would prefer the first option.

In case log seg is full you can do lct_admin("abort",0,2)

Thanks,
Deven
0
Dev
10/9/2002 9:13:25 PM
<smspears> wrote in message
news:CA4EFDD5CB36254D0044034C85256C4D.00453DC485256C4C@webforums...
> Most of the solutions presented here assume tempdb is full due to log
> space. My experience has been that often the suspend will be for the
system
> segment (work tables) in which case you must find and kill the offending
> spid.

True, but most of the time tempdb has mixed log & data segments, so when it
fills up it very often leads to a LOG SUSPEND condition. When you cannot
read from the system tables, your only chance is in dbcc commands like
'dbcc lock', but destilling the needed info from  the output quickly
becomes unworkable...

HTH,

Rob
-------------------------------------------------------------
Rob Verschoor

Certified Sybase Professional DBA for ASE 12.5/12.0/11.5/11.0

Author of "The Complete Sybase ASE Quick Reference Guide"
Online orders accepted at http://www.sypron.nl/qr

mailto:rob@DO.NOT.SPAM.sypron.nl.REMOVE.THIS.DECOY
http://www.sypron.nl
Sypron B.V., P.O.Box 10695, 2501HR Den Haag, The Netherlands
-------------------------------------------------------------

0
Rob
10/9/2002 9:33:36 PM
I have often the problem of the "tempdb is full of space", and always
the cause of the problem is a process that make something wrong,
if I alter the tempdb and allocate much spaces, soon I will lose,
because in general the process write to much data (may be is in a loop
writing)
So, I prefer kill the process that take all the spaces.
I use this select:

----------------------------------------------------------------------
----------
----------------------------------------------------------------------
----------

-- SHOW USERS IN TEMPDB
SELECT substring(name,1,13) tabla,
substring(name,14,2) nesting,
convert(int, substring(name,16,5)) spid,
convert(char(8) ,dateadd(second, (convert(int,
substring(name,21,10))/300), "19000101"), 8) connection,
crdate creation_time,
loginame
FROM tempdb..sysobjects
WHERE type = "U"
AND name like "#%"


-- KILL USUARIOS CONECTADOS CON TABLAS TEMPORALES
SELECT "kill", convert(int, substring(name,16,5)) spid, "-- ", loginame
FROM tempdb..sysobjects
WHERE type = "U"
AND name like "#%"


-- KILL USUARIOS CONECTADOS CON TABLAS TEMPORALES
SELECT "kill", spid, "-- ", suser_name(sysprocesses.suid)
FROM master..sysprocesses sysprocesses,
tempdb..sysobjects sysobjects
WHERE sysprocesses.suid <> 0
AND suser_name(sysprocesses.suid) <> "sa"
AND sysobjects.type = "U"
AND convert(int, substring(sysobjects.name,16,5)) = sysprocesses.spid
AND name like "#%"
go

----------------------------------------------------------------------
----------
----------------------------------------------------------------------
----------

In some case, sp_who don't work and if You don't like shutdown the
server, You can try kill all process, I make and script that kill
1.......kill 300 or more (is a dirty way).
sp_who use the tempdb, but the second select don't (is a table scan of
tempdb..sysobjects).

Turn on 'abort tran on log full' in tempdb & model, is not the solution
if there isn't any transaction, and the process only insert.

Sometimes there are a proccess that die but have problems to clean the
tempdb, in this case you can see and kernel error in the server log.
Good luck

Sebastian Isaac Velasco

--
Posted via http://dbforums.com

0
svelasco
10/11/2002 2:19:09 PM
Thanks for your all support.
I'll set the dboption abort tran on log full true.
And selec lct_admin("abort", 0, 2) will be very useful if this query work
properly without suspending.


"svelasco" <member@dbforums.com> wrote in message
news:1917325.1034345949@dbforums.com...
>
> I have often the problem of the "tempdb is full of space", and always
> the cause of the problem is a process that make something wrong,
> if I alter the tempdb and allocate much spaces, soon I will lose,
> because in general the process write to much data (may be is in a loop
> writing)
> So, I prefer kill the process that take all the spaces.
> I use this select:
>
> ----------------------------------------------------------------------
> ----------
> ----------------------------------------------------------------------
> ----------
>
> -- SHOW USERS IN TEMPDB
> SELECT substring(name,1,13) tabla,
> substring(name,14,2) nesting,
> convert(int, substring(name,16,5)) spid,
> convert(char(8) ,dateadd(second, (convert(int,
> substring(name,21,10))/300), "19000101"), 8) connection,
> crdate creation_time,
> loginame
> FROM tempdb..sysobjects
> WHERE type = "U"
> AND name like "#%"
>
>
> -- KILL USUARIOS CONECTADOS CON TABLAS TEMPORALES
> SELECT "kill", convert(int, substring(name,16,5)) spid, "-- ", loginame
> FROM tempdb..sysobjects
> WHERE type = "U"
> AND name like "#%"
>
>
> -- KILL USUARIOS CONECTADOS CON TABLAS TEMPORALES
> SELECT "kill", spid, "-- ", suser_name(sysprocesses.suid)
> FROM master..sysprocesses sysprocesses,
> tempdb..sysobjects sysobjects
> WHERE sysprocesses.suid <> 0
> AND suser_name(sysprocesses.suid) <> "sa"
> AND sysobjects.type = "U"
> AND convert(int, substring(sysobjects.name,16,5)) = sysprocesses.spid
> AND name like "#%"
> go
>
> ----------------------------------------------------------------------
> ----------
> ----------------------------------------------------------------------
> ----------
>
> In some case, sp_who don't work and if You don't like shutdown the
> server, You can try kill all process, I make and script that kill
> 1.......kill 300 or more (is a dirty way).
> sp_who use the tempdb, but the second select don't (is a table scan of
> tempdb..sysobjects).
>
> Turn on 'abort tran on log full' in tempdb & model, is not the solution
> if there isn't any transaction, and the process only insert.
>
> Sometimes there are a proccess that die but have problems to clean the
> tempdb, in this case you can see and kernel error in the server log.
> Good luck
>
> Sebastian Isaac Velasco
>
> --
> Posted via http://dbforums.com
>


0
lee
10/15/2002 8:56:21 AM
Reply:

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