Update configuration documentation to describe the usage of STREAMING_DELAY_SECONDS

Author: moshegood

docs/configuration.md

@@ -65,6 +65,7 @@ For **Duration** settings, the value should be be an integer followed by `ms`, `
 | `logLevel`                    | `LOG_LEVEL`                      |  String  | `info`  | Should be `debug`, `info`, `warn`, `error`, or `none`. To learn more, read [Logging](./logging.md).                                                                                                                                                                                                                                                                                                                                                        |
 | `bigSegmentsStaleAsDegraded`  | `BIG_SEGMENTS_STALE_AS_DEGRADED` | Boolean  | `false` | Indicates if environments should be considered degraded if Big Segments are not fully synchronized.                                                                                                                                                                                                                                                                                                                                            |
 | `bigSegmentsStaleThreshold`   | `BIG_SEGMENTS_STALE_THRESHOLD`   | Duration | `5m`    | Indicates how long until Big Segments should be considered stale.                                                                                                                                                                                                                                                                                                                                                                              |
+| n/a                           | `STREAMING_DELAY_SECONDS`        |  Number  | `0`     | The minimum number of seconds before responding to a new client connection. Used only in proxy mode for streaming clients. Useful for reducing memory when under heavy load, as many clients can share a single data fetch. Maximum value is 60.                                                                                                                                                                                               |
 
 _(1)_ The default values for `streamUri`, `baseUri`, and `clientSideBaseUri` are `https://stream.launchdarkly.com`, `https://sdk.launchdarkly.com`, and `https://clientsdk.launchdarkly.com`, respectively. You should never need to change these URIs unless you are either using a special instance of the LaunchDarkly service, in which case Support will tell you how to set them, or you are accessing LaunchDarkly using a reverse proxy or some other mechanism that rewrites URLs.
 

internal/streams/stream_provider_server_side.go

@@ -134,12 +134,12 @@ func (r *serverSideEnvStreamRepository) getReplayEvent() (eventsource.Event, err
 		event := MakeServerSidePutEvent(allData)
 		// So we sleep for a bit to allow a bunch of concurrent calls to
 		// all make use of this same flightGroup.
-		delayS := os.Getenv("LD_STREAMING_DELAY_SECONDS")
+		delayS := os.Getenv("STREAMING_DELAY_SECONDS")
 		if delay, err := strconv.Atoi(delayS); err == nil {
 			if delay > 0 && delay <= 60 {
 				time.Sleep(time.Duration(delay)*time.Second - time.Since(start))
 			} else {
-				r.loggers.Warnf("Ignoring invalid value for LD_STREAMING_DELAY_SECONDS: %s", delayS)
+				r.loggers.Warnf("Ignoring invalid value for STREAMING_DELAY_SECONDS: %s", delayS)
 			}
 		}