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Update comment, generation mem contexts have a "keeper" block

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The keeper block was introduced in commit 1b0d9aa4f7, but it forgot
to update this comment.
This commit is contained in:
Heikki Linnakangas
2024-01-26 01:04:58 +02:00
parent 8ba6fdf905
commit 376c216138
1 changed files with 4 additions and 2 deletions
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6
src/backend/utils/mmgr/generation.c
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@ -271,8 +271,10 @@ GenerationContextCreate(MemoryContext parent,
* GenerationReset * GenerationReset
* Frees all memory which is allocated in the given set. * Frees all memory which is allocated in the given set.
* *
* The code simply frees all the blocks in the context - we don't keep any * The initial "keeper" block (which shares a malloc chunk with the context
* keeper blocks or anything like that. * header) is not given back to the operating system though. In this way, we
* don't thrash malloc() when a context is repeatedly reset after small
* allocations.
*/ */
void void
GenerationReset(MemoryContext context) GenerationReset(MemoryContext context)