TLS Protocol Version¶
Industry best practices, and some regulations, require the use of TLS 1.1 or newer. Though no application changes are required for Motor to make use of the newest protocols, some operating systems or versions may not provide an OpenSSL version new enough to support them.
Users of macOS older than 10.13 (High Sierra) will need to install Python from python.org, homebrew, macports, or another similar source.
Users of Linux or other non-macOS Unix can check their OpenSSL version like this:
$ openssl version
If the version number is less than 1.0.1 support for TLS 1.1 or newer is not available. Contact your operating system vendor for a solution or upgrade to a newer distribution.
You can check your Python interpreter by installing the requests module and executing the following command:
python -c "import requests; print(requests.get('https://www.howsmyssl.com/a/check', verify=False).json()['tls_version'])"
You should see “TLS 1.X” where X is >= 1.
You can read more about TLS versions and their security implications here:
Thread Pool Size¶
Motor uses the Python standard library’s
ThreadPoolExecutor to defer network
operations to threads. By default, the executor uses at most five threads per CPU core on your
system; to override the default set the environment variable
Some additional threads are used for monitoring servers and background tasks, so the total count of threads in your process will be greater.