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.

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