This is an edge-triggered epoll concurrency model with blocking accept() in a (hopefully) native thread. This is comparable to
CoolioThreadPool, but is Linux-only and able to exploit "wake one" accept() behavior of a blocking accept() call when used with native threads.
This supports streaming "rack.input" and allows
:pool_size tuning independently of
This is only supported under Linux 2.6 and later kernels.
This does not buffer outgoing responses in userspace at all, meaning it can lower response latency to fast clients and also prevent starvation of other clients when reading slow disks for responses (when combined with native threads).
CoolioThreadPool is likely better for trickling large static files or proxying responses to slow clients, but this is likely better for fast clients.
CoolioThreadPool, this supports streaming "rack.input" which is useful for reading large uploads from fast clients.
This exposes no special API or extensions on top of Rack.
This can maintain idle connections without the memory overhead of an idle Thread. The cost of handling/dispatching active connections is exactly the same for an equivalent number of active connections (but independently tunable).
worker_connections are independently tunable, it is possible to get into situations where active connections need to wait for an idle thread in the thread pool before being processed
Rainbows! config block, you may specify a Thread pool size to limit your application concurrency independently of worker_connections.
Rainbows! do use :XEpollThreadPool, :pool_size => 50 worker_connections 100 end
In extremely rare cases, this may be combined with
Rainbows::AppPool if you have different concurrency capabilities for different parts of your Rack application.
raindrops 0.6.0 or later
sleepy_penguin 3.0.1 or later
Extended with: Rainbows::PoolSize
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