tiup-playground: update instructions for deploying TiProxy (#19775) (#…

…19776)

tiup/tiup-playground.md

@@ -136,25 +136,38 @@ tiup playground scale-in --pid 86526
 
 [TiProxy](/tiproxy/tiproxy-overview.md) is the official proxy component from PingCAP, placed between the client and the TiDB server to provide load balancing, connection persistence, service discovery, and other features for TiDB.
 
-Starting from TiUP v1.14.1, you can deploy TiProxy for your cluster using TiUP Playground, as in the following example:
+Starting from TiUP v1.15.0, you can deploy TiProxy for your cluster using TiUP Playground.
 
-```shell
-tiup playground v8.5.0 --tiproxy 1
-```
+1. Create a `tidb.toml` file and add the following configuration:
 
-For more information about TiProxy deployment and usage, see [TiProxy documentation](/tiproxy/tiproxy-overview.md#installation-and-usage).
+    ```
+    graceful-wait-before-shutdown=15
+    ```
 
-In the playground component, TiProxy-related command-line flags are as follows:
+    This configuration item controls the duration (in seconds) that TiDB waits before shutting down the server, avoiding client disconnections during cluster scaling-in operations.
 
-```bash
-Flags:
-      --tiproxy int                  The number of TiProxy nodes in the cluster. If not specified, TiProxy is not deployed.
-      --tiproxy.binpath string       TiProxy instance binary path.
-      --tiproxy.config string        TiProxy instance configuration file.
-      --tiproxy.host host            Playground TiProxy host. If not provided, TiProxy will still use host flag as its host.
-      --tiproxy.port int             Playground TiProxy port. If not provided, TiProxy will use 6000 as its port.
-      --tiproxy.timeout int          TiProxy maximum wait time in seconds for starting. 0 means no limit (default 60).
-```
+2. Start the TiDB cluster:
+
+    ```shell
+    tiup playground v8.5.0 --tiproxy 1 --db.config tidb.toml
+    ```
+
+    In the playground component, TiProxy-related command-line flags are as follows:
+
+    ```bash
+    Flags:
+          --tiproxy int                  The number of TiProxy nodes in the cluster. If not specified, TiProxy is not deployed.
+          --tiproxy.binpath string       TiProxy instance binary path.
+          --tiproxy.config string        TiProxy instance configuration file.
+          --tiproxy.host host            Playground TiProxy host. If not provided, TiProxy will still use host flag as its host.
+          --tiproxy.port int             Playground TiProxy port. If not provided, TiProxy will use 6000 as its port.
+          --tiproxy.timeout int          TiProxy maximum wait time in seconds for starting. 0 means no limit (default 60).
+          --tiproxy.version string       The version of TiProxy. If not specified, the latest version of TiProxy is deployed.
+    ```
+
+For more information about deploying and using TiProxy, see [TiProxy installation and usage](/tiproxy/tiproxy-overview.md#installation-and-usage).
+
+To use the TiProxy client program `tiproxyctl`, see [Install TiProxy Control](/tiproxy/tiproxy-command-line-flags.md#install-tiproxy-control).
 
 ## Deploy PD microservices