Re: Faster inserts with mostly-monotonically increasing values - Mailing list pgsql-hackers

On Mon, Mar 5, 2018 at 9:37 PM, Claudio Freire <klaussfreire@gmail.com> wrote:
> Assuming the rightmost page is the first page the value could be on,
> it already does get an exclusive buffer lock.

That made me check, and:

+        /*
+         * Acquire exclusive lock on the buffer before doing any checks. This
+         * ensures that the index state cannot change, as far as the rightmost
+         * part of the index is concerned.
+         */
+        LockBuffer(buf, BUFFER_LOCK_EXCLUSIVE);

BTree code uses BT_READ and BT_WRITE instead, so that should be:

LockBuffer(buf, BT_WRITE)