Re: Slow performance with 9.3-110x JDBC 4

You might want to do the same tests after adding ?protocolVersion=2
to the connection URL.
i.e.:
jdbc:postgresql://localhost/database?protocolVersion=2

2014-03-27 15:35 GMT+02:00 ChatPristi <cchristo_0899(at)yahoo(dot)fr>:
> Dear All,
>
> I have a java program that does bulk insertions (with transactions and
> PreparedStatements) in a postgresql database. I have a performance divided
> between two and four when using 9.3-1100 JDBC4 and 9.3-1101 in comparison
> with postgresql-8.4-703 JDBC4 independently of postgresql version.
>
> Time(ms) PG 8.4.7 9.3.4
> Driver
> 8.4-703 193390 188379
> 9.3.1101 349404 344344
>
> Does anybody else saw such a difference ? What reasons can explain it ?
>
> Another point, is that the bulk insertions are prerformed by parallel
> processes and 9.3-110x JDBC4 drivers appear to scale poorly.
>
> Thanks for any help.