Correct the documentation for work_mem

Hi,

I recently noticed the following in the work_mem [1] documentation:

“Note that for a complex query, several sort or hash operations might be running in parallel;”

The use of “parallel” here is misleading as this has nothing to do with parallel query, but
rather several operations in a plan running simultaneously.

The use of parallel in this doc predates parallel query support, which explains the usage.

I suggest a small doc fix:

“Note that for a complex query, several sort or hash operations might be running simultaneously;”

This should also be backpatched to all supported versions docs.

Thoughts?

Regards,

Sami Imseih
Amazon Web Services (AWS)

1. https://www.postgresql.org/docs/current/runtime-config-resource.html