On 08/28/2016 04:41 PM, Tom Lane wrote:
Robert Haas <robertmh...@gmail.com> writes:
Also, I think we ought to replace this code in aset.c:
initBlockSize = MAXALIGN(initBlockSize);
if (initBlockSize < 1024)
initBlockSize = 1024;
maxBlockSize = MAXALIGN(maxBlockSize);
With this:
Assert(initBlockSize >= 1024 && initBlockSize == MAXALIGN(initBlockSize));
Assert(maxBlockSize == MAXALIGN(maxBlockSize));
Good idea --- if we'd had it that way, these errors would never have
gotten committed in the first place. I'm for doing that only in HEAD
though.
Then maybe also add
Assert(initBlockSize <= maxBlockSize);
And perhaps also an assert making sure the minContextSize value makes
sens with respect to the min/max block sizes?
I'm however pretty sure this will have absolutely no impact on profiles.
It might save a few cycles, but this only runs when creating the memory
context and all profiles I've seen are about palloc/pfree.
It might matter when creating many memory contexts, but then you
probably have other things to worry about.
regards
--
Tomas Vondra http://www.2ndQuadrant.com
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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