This restricts the memory used by ordinary backends when doing the
cleanup to be work_mem. Shouldn't we let them use
maintenance_work_mem? Only one backend can be doing this clean up of a
given index at any given time, so we don't need to worry about many
concurrent allocations of maintenance_work_mem.  This seems very
similar in spirit to index creation, where a backend is allowed to use
maintenance_work_mem.
Because it could be a several indexes in one pg instance. And each cleaner could eat maintenance_work_mem.




Also, do we plan on backpatching this?  While there are no known
Yes


--
Teodor Sigaev                                   E-mail: teo...@sigaev.ru
                                                   WWW: http://www.sigaev.ru/


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