pgsql: Count write times when extending relation files for shared buffe

Count write times when extending relation files for shared buffers

Relation files extended by multiple blocks at a time have been counting
the number of blocks written, but forgot to increment the write time in
this case, as single-block write and relation extension are treated as
two different I/O operations in the shared stats: IOOP_EXTEND vs
IOOP_WRITE. In this case IOOP_EXTEND was forgotten for normal
(non-temporary) relations, still the number of blocks written was
incremented according to the relation extend done.

Write times are tracked when track_io_timing is enabled, which is not
the case by default.

Author: Nazir Bilal Yavuz
Reviewed-by: Robert Haas, Melanie Plageman
Discussion: https://postgr.es/m/CAN55FZ19Ss279mZuqGbuUNxka0iPbLgYuOQXqAKewrjNrp27VA@mail.gmail.com
Backpatch-through: 16

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/d17ffc734dad8c231ad3deee0b3670ecb99b713d

Modified Files
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src/backend/utils/activity/pgstat_io.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)