Enable async logging by default (#3606)

Signed-off-by: Nicu Reut <nicu.reut@digitalasset.com>

Author: nicu-da

cluster/images/common/entrypoint.sh

@@ -16,7 +16,7 @@ if [[ ! " ${*} " =~ " --console " ]]; then
     ARGS+=( daemon --no-tty )
 fi
 
-ARGS+=( --log-encoder=json --log-level-stdout="${LOG_LEVEL_STDOUT:-DEBUG}" --log-level-canton="${LOG_LEVEL_CANTON:-DEBUG}" --log-file-appender=off --log-immediate-flush="${LOG_IMMEDIATE_FLUSH:-true}" --log-last-errors=false)
+ARGS+=( --log-encoder=json --log-level-stdout="${LOG_LEVEL_STDOUT:-DEBUG}" --log-level-canton="${LOG_LEVEL_CANTON:-DEBUG}" --log-file-appender=off --log-immediate-flush="${LOG_IMMEDIATE_FLUSH:-false}" --log-last-errors=false)
 
 if [ -f /app/logback.xml ]; then
    export JAVA_TOOL_OPTIONS="-Dlogback.configurationFile=/app/logback.xml ${JAVA_TOOL_OPTIONS:-}"

docs/src/release_notes.rst

@@ -97,6 +97,11 @@
     - Add a new config field to ``SvOnboardingConfig`` named ``unclaimedDevelopmentFundCouponsThreshold`` defining the
       threshold above which ``UnclaimedDevelopmentFundCoupon`` s are merged. The default value is set to 10.
 
+  - Deployments
+
+    - The default logger has been switched to use an asynchronous appender, for all the nodes, for better performance.
+      The behavior can be switched back to synchronous logging by setting the environment variable `LOG_IMMEDIATE_FLUSH=true`.
+
 .. release-notes:: 0.5.6
 
   - Sequencer