Hi Yugo, I tested with serialization error scenario by setting: default_transaction_isolation = 'repeatable read' The result was:
$ pgbench -t 10 -c 10 --max-tries=10 test transaction type: <builtin: TPC-B (sort of)> scaling factor: 10 query mode: simple number of clients: 10 number of threads: 1 maximum number of tries: 10 number of transactions per client: 10 number of transactions actually processed: 100/100 number of failed transactions: 0 (0.000%) number of transactions retried: 35 (35.000%) total number of retries: 74 latency average = 5.306 ms initial connection time = 15.575 ms tps = 1884.516810 (without initial connection time) I had hard time to understand what those numbers mean: number of transactions retried: 35 (35.000%) total number of retries: 74 It seems "total number of retries" matches with the number of ERRORs reported in PostgreSQL. Good. What I am not sure is "number of transactions retried". What does this mean? Best reagards, -- Tatsuo Ishii SRA OSS, Inc. Japan English: http://www.sraoss.co.jp/index_en.php Japanese:http://www.sraoss.co.jp