Re: is tcp flow control broken in -current

["Jonathan A. Kollasch" <jakllsch%kollasch.net@localhost>]

On Wed, Aug 12, 2020 at 09:56:33PM +0200, Frank Kardel wrote:
> Hi !
> 
> While running a java application on -current(9.99.60+70) with JDBC talking
> to a postgres11 database I observed the following:
> 
> The application runs and processes large number of queries via the tcp
> back-end connection via the loopback interface. After a while the
> communication
> 
> slows down significantly.
> 
> The database back-end get a single character of a query string once every
> five seconds and later on once per minute. At the same time netstat -an

It's not just me!  I see this all the time with iperf3 (usually only
when the bulk of the traffic is going in a specific direction, which I
don't remember at the moment) after a few gigabytes of transfer.