I have written a blog regarding one of new features in upcoming Pgpool-II 4.2. https://pgsqlpgpool.blogspot.com/2020/07/snapshot-isolation-mode.html Enjoy! -- Tatsuo Ishii SRA OSS, Inc. Japan English: http://www.sraoss.co.jp/index_en.php Japanese:http://www.sraoss.co.jp