how PoolLimits soft and hard limits work?

[dmfigol]

Sorry, I couldn't find this anywhere.
Do you mind explaining what soft and hard limits actually do?

pool_limits = httpx.PoolLimits(soft_limit=20, hard_limit=100)
client = httpx.AsyncClient(pool_limits)

Thank you!

[tomchristie]

@dmfigol - How's this?... https://github.com/encode/httpx/pull/712/files

[dmfigol]

@tomchristie this is helpful, thank you!
Could you provide a little bit more details, what is the expected behavior when soft limit and hard limit are reached?
If I understood correctly when hard limit is reached, we will be just waiting for an existing connection to be released, but I have no idea about the soft one.

[tomchristie]

Closing this in favour of #787.

what is the expected behavior when soft limit and hard limit are reached?

• soft_limit reached: when a connection is closed, it gets fully closed, rather than staying in a keep-alive state for a bit.
• hard_limit reached: cannot establish more connections than this limit. Attempts to make a new connection will wait until the configured pool timeout, and error if connection is made available within that time.