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IBM Data and AI Ideas Portal for Customers

This portal is to open public enhancement requests against products and services offered by the IBM Data & AI organization. To view all of your ideas submitted to IBM, create and manage groups of Ideas, or create an idea explicitly set to be either visible by all (public) or visible only to you and IBM (private), use the IBM Unified Ideas Portal (

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Welcome to the IBM Ideas Portal ( - Use this site to find out additional information and details about the IBM Ideas process and statuses.

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Status Not under consideration
Workspace Informix
Components Informix Server
Created by Guest
Created on Jun 3, 2014

Only in-memory Temp table

Temporary table only cached in the memory, it does not to write into the temp dbspace.
Requirement from China mobile (CMCC), CMCC use lots of temp table in the following 2 ways:
Create temp table ... with no log;
select * from tab into temp tabname with no log;
there are lots of large temp tables ,
and the I/O on tempdbspaces is very busy, but the disk is not fast enough to do so much temp I/O, it causes the I/O waiting issue.

New feature: only in-memory temp table
there temp table only cached in the memory if the memory (buffer pool) is enough, when drop the temp table, when checkpoint occurs, it does not to write it to disk, just disappear from the server.
It can save lots of I/O.
  • Guest
    Jul 15, 2021

    Dear Customer,

    We have looked at this idea and there are significant technical considerations attached to this implementation. We will revisit this at a later point in time.

    Karthik Gopalakrishnan