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

Count write times when extending relation files for shared buffers

Relation files extended multiple blocks at a time have been counting the
number of blocks written, but forgot that to increment the write time in
this case, as 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.

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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REL_16_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/2308f18c073333babdcc45139d691a74fae87863

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