17.10 - MaxSyncWALWrites - Advanced SQL Engine - Teradata Database

Teradata Vantageā„¢ - Database Utilities

Product
Advanced SQL Engine
Teradata Database
Release Number
17.10
Release Date
July 2021
Content Type
Configuration
Publication ID
B035-1102-171K
Language
English (United States)

Determines the maximum number of outstanding WAL log writes to allow before tasks requiring synchronous writes are delayed to achieve better buffering.

Field Group

File System

Valid Range

1 through 40

Default

5

Changes Take Effect

After the next database restart.

Usage Notes

If the number of outstanding WAL log writes is less than or equal to the MaxSyncWALWrites value, requests for synchronous operations will append the record to the current buffer, force a new buffer, and issue a synchronous write on the current buffer.

If the number of outstanding writes is greater than the MaxSyncWALWrites value, the record will be appended, but the write will be delayed until one of the outstanding write requests is completed.