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