RE: Locally managed tablespace

From: Christopher Spence <cspence_at_FuelSpot.com>
Date: Fri, 14 Sep 2001 06:27:42 -0700
Message-ID: <F001.0038E68A.20010914060518@fatcity.com>

!! Please do not post Off Topic to this List !!

I use LMT's a lot.

Advantages

1. Avoids honeycomb fragmentation
2. Simple administration
3. Avoid the need for rebuilding due to fragmented extents
4. Faster when dealing with local extents
5. No need to coalesce (hense eliminate problems with SMON) Disadvantages
6. No rollback generated during space management
7. Reduced data dictionary contention

Disadvantage

1. Not very well understood
2. Deciding common sizes for objects in the same tablespace may be a little more difficult.
3. When accessing xxx_EXTENTS all data files bitmaps are hit and may cause large performance problems when dealing with all extents across the database
4. All extent information is spread across many data files, so simple global extent operations may involve visiting many blocks.

"Do not criticize someone until you walked a mile in their shoes, that way when you criticize them, you are a mile a way and have their shoes."

Christopher R. Spence
Oracle DBA
Phone: (978) 322-5744
Fax: (707) 885-2275

Fuelspot
73 Princeton Street
North, Chelmsford 01863  

-----Original Message-----
Sent: Thursday, September 13, 2001 6:15 PM To: Multiple recipients of list ORACLE-L

!! Please do not post Off Topic to this List !!

Anyone here tried to use those locally managed tablespace? Some DBA here persuade me to use the locally managed TS for the
rollback segment,tables, indexes, temp tablespace

Can you tell me what are the benefits of using the locally managed tablespace, any disadvantages?

Thanks in advance.

Chris Harvest.
Creative Consulting.

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Author: CC Harvest
  INET: ccharvest_at_yahoo.com

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Author: Christopher Spence
  INET: cspence_at_FuelSpot.com

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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 Fri Sep 14 2001 - 08:27:42 CDT