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Home -> Community -> Mailing Lists -> Oracle-L -> RE: LMT monitoring
Kevin
For Raj's purposes, is it possible to estimate a range? I'm thinking he really just needs an estimate to see if he is getting close.
Dennis Williams
DBA, 40%OCP, 100% DBA
Lifetouch, Inc.
dwilliams_at_lifetouch.com
-----Original Message-----
Sent: Monday, March 10, 2003 12:40 PM
To: Multiple recipients of list ORACLE-L
There are three (3) types of LMTs (yes, three!)
UNIFORM Extent sizes
Every extent created in the tablespace will be the same size, no matter the
storage parameters specified.
AUTOALLOCATE (System managed)
The system will decide the next extent size at creation. This is based on a
large number of things. (I think the phase of the moon and the number of
sun-spots on 03-03-1942 are included in this calculation) The min extent
size is 64K
USER Allocated
This is only available for tablespaces that were converted from dictionary
managed tablespaces. As it would seem, the user determines the space
allocation -- the space allocation is the same as for dictionary managed
tablespaces. The benefit is that bitmaps rather than freelists are used to
identify free space.
With UNIFORM, you can tell exactly how many allocations will be required to fill up the tablespace. (freespace / extent-size = #allocs)
With User Allocated use the same logic as you would for dictionary managed tablespaces.
With Auto-Allocated extents, um. You don't know what the next extent size will be.
Kevin
-----Original Message-----
Sent: Monday, March 10, 2003 12:04 PM
To: Multiple recipients of list ORACLE-L
I admit to being sleep-deprived but I don't see how there is a difference between monitoring dictionary managed and locally managed tablespaces when you are talking about the inability to allocate another extent.
It seems relatively simple to me: check the size of the next extent that will be allocated (this can be calculated, regardless of auto allocate, uniform or dictionary managed next and pctincrease). Check to see if there is that much space available in the tablespace. If you REALLY want to be paranoid, do this as if you expect EVERY table and index in the tablespace to extend at the same time.
If remaining unallocated space is greater than the next extent allocation you calculate, you have enough space. If it is not, you have to add a datafile or extend the existing one.
Or am I missing something?
Rachel
-- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Rachel Carmichael INET: wisernet100_at_yahoo.com Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Toepke, Kevin M INET: ktoepke_at_TRILEGIANT.COM Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: DENNIS WILLIAMS INET: DWILLIAMS_at_LIFETOUCH.COM Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).Received on Mon Mar 10 2003 - 13:40:22 CST
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