Zoltan Boszormenyi wrote:
> Hi,
>
> I got a question about scalability in high volume insert situation
> where the table has a primary key and several non-unique indexes
> on other columns of the table. How does PostgreSQL behave
> in terms of scalability? The high volume of inserts comes from
> multiple transactions.
btree and gist indexes can have multiple concurrent insertions in
flight. A potential for blocking is in UNIQUE indexes: if two
transactions try to insert the same value in the unique index, the
second one will block until the first transaction finishes.
--
Alvaro Herrera http://www.CommandPrompt.com/
The PostgreSQL Company - Command Prompt, Inc.