C comment: track_activity_query_size doesn't support memory units

And explain why.

Per report from Pavel Stehule

diff --git a/src/backend/utils/misc/guc.c b/src/backend/utils/misc/guc.c
index ea54d164ccc4be29f7ede255ff085bbb9cb956d8..15020c4508c6e9c8651c9fbfef0baa5eab45f5a8 100644 (file)
--- a/src/backend/utils/misc/guc.c
+++ b/src/backend/utils/misc/guc.c
@@ -2543,6 +2543,7 @@ static struct config_int ConfigureNamesInt[] =
                {"track_activity_query_size", PGC_POSTMASTER, RESOURCES_MEM,
                        gettext_noop("Sets the size reserved for pg_stat_activity.query, in bytes."),
                        NULL,
+                       /* There is no _bytes_ unit, so the user can't supply units for this. */
                },
                &pgstat_track_activity_query_size,
                1024, 100, 102400,