That is odd. I just testing on 8.1.3:
template1=# set maintenance_work_mem = 2149478; SET
I'm betting Joshua is testing on a 64-bit machine. Since 8.1, the max
allowed value is dependent on sizeof(pointer) ...
Oops... yes my test workstation is a Dual Core AMD64.
Sincerely,
Joshua D. Drake
regards, tom lane
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