While looking at some of the recent churn in DSA I noticed that
dsa_size_class_map should probably be declared const.
diff --git a/src/backend/utils/mmgr/dsa.c b/src/backend/utils/mmgr/dsa.c
index 33ab8d05d3..70ce7ce7da 100644
--- a/src/backend/utils/mmgr/dsa.c
+++ b/src/backend/utils/mmgr/dsa.c
@@ -256,7 +256,7 @@ static const uint16 dsa_size_classes[] = {
* round the size of the object up to the next multiple of 8 bytes, and then
* index into this array.
*/
-static char dsa_size_class_map[] = {
+static const char dsa_size_class_map[] = {
2, 3, 4, 5, 6, 7, 8, 9, 10, 10, 11, 11, 12, 12, 13, 13,
14, 14, 14, 14, 15, 15, 15, 15, 16, 16, 16, 16, 17, 17, 17, 17,
18, 18, 18, 18, 18, 18, 18, 18, 19, 19, 19, 19, 19, 19, 19, 19,
