From 6e3ee0d38af6cf649355daf8a9afe27355e93fef Mon Sep 17 00:00:00 2001 From: Bertrand Drouvot Date: Mon, 29 Jun 2026 06:31:58 +0000 Subject: [PATCH v1] Fix floating-point noise in pg_stat_us_to_ms() Multiplying by 0.001 can produce trailing-digit noise in displayed values (for example 0.009000000000000001 instead of 0.009, should extra_float_digits not being set to 0) because 0.001 cannot be represented exactly in binary floating point. Use division by 1000.0 instead as it is the most common way to deal with such computation in the code tree. Author: Bertrand Drouvot --- src/backend/utils/adt/pgstatfuncs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) 100.0% src/backend/utils/adt/ diff --git a/src/backend/utils/adt/pgstatfuncs.c b/src/backend/utils/adt/pgstatfuncs.c index 6f9c9c72de5..1e5f8293b28 100644 --- a/src/backend/utils/adt/pgstatfuncs.c +++ b/src/backend/utils/adt/pgstatfuncs.c @@ -1457,7 +1457,7 @@ pgstat_get_io_time_index(IOOp io_op) static inline double pg_stat_us_to_ms(PgStat_Counter val_ms) { - return val_ms * (double) 0.001; + return (double) val_ms / 1000.0; } /* -- 2.34.1