Bug #84184 UndoIndexBuffer and UndoDataBuffer are not used as of 5.1
Submitted: 13 Dec 2016 13:44 Modified: 30 Aug 2021 20:40
Reporter: Mikiya Okuno Email Updates:
Status: Closed Impact on me:
Category:MySQL Cluster: Cluster (NDB) storage engine Severity:S3 (Non-critical)
Version:7.5.4 OS:Any
Assigned to: CPU Architecture:Any

[13 Dec 2016 13:44] Mikiya Okuno

In the manual, there are description of UndoIndexBuffer and UndoDataBuffer, however, these options are not used at all for ages. They were used in 5.0.

How to repeat:

Suggested fix:
[3 Aug 2017 14:56] Jon Stephens
If these parameters aren't used any longer, then they should go through the deprecation/removal process.
[30 Aug 2021 20:40] Jon Stephens
Documented fix as follows in the NDB 8.0.27 changelog:

    The data node configuration parameters UndoDataBuffer and
    UndoIndexBuffer have no effect in any currently supported
    versions of NDB Cluster. Both parameters are now deprecated; you
    should expect them to be removed in a future release.

Also updated the descriptions of these parameters in the Manual.