diff --git a/CHANGELOG.md b/CHANGELOG.md
index ff6d1b3cbe..21014de747 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -25,6 +25,7 @@ BUG FIXES:
 
 * API health check is also returned by accessing the root path at / ([#2469](https://github.com/microsoft/AzureTRE/pull/2469))
 * Temporary disable AppInsight's private endpoint in base workspace ([#2543](https://github.com/microsoft/AzureTRE/pull/2543))
+* Resource Processor execution optimization (`porter show`) for long-standing services ([#2542](https://github.com/microsoft/AzureTRE/pull/2542))
 
 ## 0.4.2 (August 23, 2022)
 
diff --git a/resource_processor/_version.py b/resource_processor/_version.py
index 98a433b310..3dd3d2d51b 100644
--- a/resource_processor/_version.py
+++ b/resource_processor/_version.py
@@ -1 +1 @@
-__version__ = "0.4.5"
+__version__ = "0.4.6"
diff --git a/resource_processor/resources/commands.py b/resource_processor/resources/commands.py
index 482354b508..4bbaf94d0c 100644
--- a/resource_processor/resources/commands.py
+++ b/resource_processor/resources/commands.py
@@ -71,21 +71,21 @@ async def build_porter_command(config, logger, msg_body, custom_action=False):
                     f" {porter_parameters} --allow-docker-host-access --force"
                     f" --cred ./vmss_porter/arm_auth_local_debugging.json"
                     f" --cred ./vmss_porter/aad_auth.json"
-                    f" && porter show {installation_id}"]
+                    ]
     return command_line
 
 
 async def build_porter_command_for_outputs(msg_body):
     installation_id = get_installation_id(msg_body)
     # we only need "real" outputs and use jq to remove the logs which are big
-    command_line = [f"porter show {installation_id} --output json | jq -c '. | select(.Outputs!=null) | .Outputs | del (.[] | select(.Name==\"io.cnab.outputs.invocationImageLogs\"))'"]
+    command_line = [f"porter installations output list --installation {installation_id} --output json | jq -c 'del (.[] | select(.Name==\"io.cnab.outputs.invocationImageLogs\"))'"]
     return command_line
 
 
 async def get_porter_parameter_keys(config, logger, msg_body):
     command = [f"{azure_login_command(config)} >/dev/null && \
         {azure_acr_login_command(config)} >/dev/null && \
-        porter explain --reference {config['registry_server']}/{msg_body['name']}:v{msg_body['version']} -ojson"]
+        porter explain --reference {config['registry_server']}/{msg_body['name']}:v{msg_body['version']} --output json"]
 
     proc = await asyncio.create_subprocess_shell(
         ''.join(command),
diff --git a/resource_processor/vmss_porter/Dockerfile b/resource_processor/vmss_porter/Dockerfile
index d2dac8021e..34642782dc 100644
--- a/resource_processor/vmss_porter/Dockerfile
+++ b/resource_processor/vmss_porter/Dockerfile
@@ -3,7 +3,7 @@ FROM python:3.8-slim-buster
 SHELL ["/bin/bash", "-o", "pipefail", "-c"]
 
 # Install Azure CLI
-ARG AZURE_CLI_VERSION=2.37.0-1~buster
+ARG AZURE_CLI_VERSION=2.39.0-1~buster
 COPY scripts/azure-cli.sh /tmp/
 RUN export AZURE_CLI_VERSION=${AZURE_CLI_VERSION} \
     && /tmp/azure-cli.sh
diff --git a/resource_processor/vmss_porter/runner.py b/resource_processor/vmss_porter/runner.py
index 2b6c683031..cf5c36b5f2 100644
--- a/resource_processor/vmss_porter/runner.py
+++ b/resource_processor/vmss_porter/runner.py
@@ -161,7 +161,9 @@ async def invoke_porter_action(msg_body: dict, sb_client: ServiceBusClient, mess
     # Build and run porter command (flagging if its a built-in action or custom so we can adapt porter command appropriately)
     is_custom_action = action not in ["install", "upgrade", "uninstall"]
     porter_command = await build_porter_command(config, message_logger_adapter, msg_body, is_custom_action)
+    message_logger_adapter.debug("Starting to run porter execution command...")
     returncode, _, err = await run_porter(porter_command, message_logger_adapter, config)
+    message_logger_adapter.debug("Finished running porter execution command.")
 
     # Handle command output
     if returncode != 0:
@@ -191,7 +193,9 @@ async def get_porter_outputs(msg_body: dict, message_logger_adapter: logging.Log
     Get outputs JSON from a Porter command
     """
     porter_command = await build_porter_command_for_outputs(msg_body)
+    message_logger_adapter.debug("Starting to run porter output command...")
     returncode, stdout, err = await run_porter(porter_command, message_logger_adapter, config)
+    message_logger_adapter.debug("Finished running porter output command.")
 
     if returncode != 0:
         error_message = "Error context message = " + " ".join(err.split('\n'))