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C comment: correct use of 64-"byte" cache line size

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Reported-by: Kelly Min

Discussion: https://postgr.es/m/CAPSbxatOiQO90LYpSC3+svAU9-sHgDfEP4oFhcEUt_X=DqFA9g@mail.gmail.com

Backpatch-through: 9.5
This commit is contained in:
Bruce Momjian 2020-09-04 13:27:52 -04:00
parent aa4eeb38f3
commit 56f42cf906
1 changed files with 1 additions and 1 deletions
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src/include/storage/buf_internals.h
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@ -204,7 +204,7 @@ typedef struct BufferDesc
* Note that local buffer descriptors aren't forced to be aligned - as there's * Note that local buffer descriptors aren't forced to be aligned - as there's
* no concurrent access to those it's unlikely to be beneficial. * no concurrent access to those it's unlikely to be beneficial.
* *
* We use 64bit as the cache line size here, because that's the most common * We use a 64-byte cache line size here, because that's the most common
* size. Making it bigger would be a waste of memory. Even if running on a * size. Making it bigger would be a waste of memory. Even if running on a
* platform with either 32 or 128 byte line sizes, it's good to align to * platform with either 32 or 128 byte line sizes, it's good to align to
* boundaries and avoid false sharing. * boundaries and avoid false sharing.