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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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Status Not under consideration
Workspace Informix
Components Informix Server
Created by Guest
Created on Jun 4, 2020

Make onstat -g rss log buffer(s) size configurable.

I have run onstat -g rss log and are seeing 10% cache misses on some systems.

I would like the underlying buffer space to be configurable similar to etc.

As per our Lab Advocate:

From my interpretation of the source the information displayed on the primary by the “onstat -g rss log” command relates to the log buffer pages sent to an RSS server. These pages are copied from the logical log buffers when they are flushed and put onto an internal queue. If the RSS is connected (and caught up) then the required log pages can be taken from this queue and are counted as a cached copy. When the RSS requires a log page that is earlier than those in the queue then they have to be read directly from disk which is then counted as a disk copy. When flushing pages from the logical log buffers if the queue for the RSS is full then the page cannot be saved in the queue and it is counted as “tossed.” The size of the queue is fixed at 3 x the size of the logical log buffer LOGBUFF (when expressed in pages).

Needed by Date Aug 1, 2020