Nagle’s algorithm and Delayed ACK’s algorithm are enabled by default on sockets in Linux. As a result we can experience 40ms latency on simply waiting for ACK on the client side. Disabling the Nagle’s algorithm (using TCP_NODELAY) should fix the issue (client won’t wait 40ms for ACKs).
This change sets `TCP_NODELAY` on every socket created by the `http_client`.
Checking for dead peers or network is helpful in maintaining a lifetime of the http client. This change also sets TCP_KEEPALIVE option on the http client's socket.
Fixes: VECTOR-169
Closesscylladb/scylladb#25401
* github.com:scylladb/scylladb:
vector_store_client: set keepalive for the http client's socket
vector_store_client: disable Nagle's algorithm on the http client
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