postgres.git / summary / log / commit / refs

commit    ee4673ac071f8352c41cc673299b7ec695f079ff
Author:   Robert Haas <rhaas@postgresql.org>
Date:     Tue Oct 31 09:24:41 2017 +0000

    Don't exaggerate the number of temporary blocks read.
    
    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


 src/backend/storage/file/buffile.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/backend/storage/file/buffile.c b/src/backend/storage/file/buffile.c
index 4ca0ea4f2a3..de85b6805c2 100644
--- a/src/backend/storage/file/buffile.c
+++ b/src/backend/storage/file/buffile.c
@@ -264,7 +264,8 @@ BufFileLoadBuffer(BufFile *file)
 	file->offsets[file->curFile] += file->nbytes;
 	/* we choose not to advance curOffset here */
 
-	pgBufferUsage.temp_blks_read++;
+	if (file->nbytes > 0)
+		pgBufferUsage.temp_blks_read++;
 }
 
 /*


[parent: cf7ab13bfb45]