can attest to this fact, I've isolated this issue in Openstack components once or twice where we identified CPU-bound tasks blocking other greenlets leading to

can attest to this fact, I've isolated this issue in Openstack components once or twice where we identified CPU-bound tasks blocking other greenlets leading to new MySQL database connections rejecting the client, because there's an initial auth phase that has a very short 10 second timeout while it waits for the client's response to a security challenge.