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Status Future consideration
Workspace IBM Engineering - Foundation/Common Services
Categories Installation Installation
Created by Guest
Created on Dec 13, 2024

RELATED IDEAS

Table space limitation of 30TBs per tablespace even when activating bigfile in Oracle database

See this idea on ideas.ibm.com

Oracle limitation of 30TBs per tablespace

 

Move the lob segments of table REPOSITORY_CONTENT_STORAGE to a separate tablespace with 32K block size, which would give us a big file with 128TB size.

 

This would mean to change the definition of the mentioned table as follows within the IBM CCM software:

 

  1. set Parameter db_32k_cache_size first:

SQL

alter system set db_32k_cache_size=128M scope=BOTH sid='*';

 

2.  create a tablespace with the following statement:

SQL

CREATE BIGFILE TABLESPACE "CCM1_LOB" DATAFILE 
 SIZE 1000G
 AUTOEXTEND ON NEXT 500G MAXSIZE 128T
 LOGGING ONLINE PERMANENT BLOCKSIZE 32768
 EXTENT MANAGEMENT LOCAL AUTOALLOCATE DEFAULT 
NOCOMPRESS  SEGMENT SPACE MANAGEMENT AUTO;

 

3. Change the table definition:

 

SQL

ALTER TABLE CCM1USER.REPOSITORY_CONTENT_STORAGE MOVE LOB CONTENT_BYTES 
STORE AS BASICFILE (
TABLESPACE "CCM1_LOB" ENABLE STORAGE IN ROW CHUNK 32768 RETENTION 
NOCACHE LOGGING 
STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1
BUFFER_POOL DEFAULT FLASH_CACHE DEFAULT CELL_FLASH_CACHE DEFAULT)) ;

 

 

Idea priority Urgent
Needed By Yesterday (Let's go already!)
  • Post comment
  • Guest
    Reply
    |     Feb 10, 2025
    As part of the review process, we strive to be transparent about our intentions with each idea suggestion. The IBM Engineering Reporting team has reviewed the idea, and based on our understanding, it is accepted as an uncommitted candidate.
  • Guest
    Reply
    |     Jan 20, 2025
    Thank you for submitting idea. IBM Engineering team review board evaluated this request and determined it will need additional information to evaluate this request.

    30TB per tablespace is quite a large size and no other ELM customers have reached this limit. Could you provide details what is this tablespace used and why is this larger?
  • Guest
    Reply
    |     Jan 13, 2025
    Thank you for submitting idea. IBM Engineering team review board evaluated this request and determined it will need additional time to evaluate this request.

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