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Don't exaggerate the number of temporary blocks read.

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A read that returns zero bytes (or an error) should not increment
the number of temporary blocks read.

Thomas Munro

Discussion: http://postgr.es/m/CAEepm=21xgihg=WaG+O5MFotEZfN6kFETpfw+RkSnEqNQqGn2Q@mail.gmail.com
This commit is contained in:
Robert Haas 2017-10-31 14:54:41 +05:30
parent cf7ab13bfb
commit ee4673ac07
1 changed files with 2 additions and 1 deletions
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3
src/backend/storage/file/buffile.c
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@ -264,7 +264,8 @@ BufFileLoadBuffer(BufFile *file)
file->offsets[file->curFile] += file->nbytes; file->offsets[file->curFile] += file->nbytes;
/* we choose not to advance curOffset here */ /* we choose not to advance curOffset here */
pgBufferUsage.temp_blks_read++; if (file->nbytes > 0)
pgBufferUsage.temp_blks_read++;
} }
/* /*