Обсуждение: opening connection more expensive than closing connection?

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opening connection more expensive than closing connection?

От
Rob Sargent
Дата:
A developer here accidentally flooded a server with connection opens and
closes, essentially one per transaction during a multi-threaded data
migration process.

We were curious if this suggests that connection clean up is more
expensive than creation thereby exhausting resources, or if perhaps the
server wasn't returning to the essentially backgrounded clean-up task
adroitly (enough)?

Don't worry we are now using a connection pool for the migration, but
the situation was, um, er, entertaining.  The server side said
eof-from-client, the client side said many variations of cannot-connect,
then they would work out their differences briefly and do the same dance
over again after sufficient connections.

Cheers,
rjs




Re: opening connection more expensive than closing connection?

От
Rob Sargent
Дата:
top posting my self to clarify, since the title is in fact inverted:
close might be more expensive the open.


On 03/03/2011 08:28 AM, Rob Sargent wrote:
> A developer here accidentally flooded a server with connection opens and
> closes, essentially one per transaction during a multi-threaded data
> migration process.
>
> We were curious if this suggests that connection clean up is more
> expensive than creation thereby exhausting resources, or if perhaps the
> server wasn't returning to the essentially backgrounded clean-up task
> adroitly (enough)?
>
> Don't worry we are now using a connection pool for the migration, but
> the situation was, um, er, entertaining.  The server side said
> eof-from-client, the client side said many variations of cannot-connect,
> then they would work out their differences briefly and do the same dance
> over again after sufficient connections.
>
> Cheers,
> rjs
>
>
>
>