cppcms-users

[Cppcms-users] @pool_size passed to cppdb::connection

[CN <cn...@fa...>]

Hi!

Suppose each synchronous application establishes exact one
cppdb::connection passed with @pool_size=3. Imagine now there are 3
synchronous applications concurrently running in 3 threads.

What will happen if a synchronous application is launched to run as the
4th thread? Will it be blocked at

cppdb::connection myconn("...@pool_size=3...")

until some other thread finished its use of cppdb::connection, or the
4th instance of cppdb::connection will be created by the 4th thread
regardless of the "limit" imposed by the parameter @pool_size=3?

Thank you in advance for the clarification!

Best Reagards,
CN

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Re: [Cppcms-users] @pool_size passed to cppdb::connection

[Artyom B. <art...@gm...>]

On Sun, Dec 27, 2015 at 9:27 AM, CN <cn...@fa...> wrote:

> Suppose each synchronous application establishes exact one
> cppdb::connection passed with @pool_size=3. Imagine now there are 3
> synchronous applications concurrently running in 3 threads.
>
> What will happen if a synchronous application is launched to run as the
> 4th thread? Will it be blocked at
>

No the connection will be created but when on attempt to recycle it into
the pool the "full pool" will be detected and the connection will be deleted.

i.e. @pool_size=3 means that no more than 3 connections are kept for
reuse.

Artyom