docs(metrics): remove metrics API

Author: mhartington

content/200-orm/200-prisma-client/000-setup-and-configuration/050-databases-connections/115-connection-pool.mdx

@@ -86,7 +86,7 @@ datasource db {
 
 #### Viewing the connection pool size
 
-The number of connections Prisma Client uses can be viewed using [logging](/orm/prisma-client/observability-and-logging/logging) and [metrics](/orm/prisma-client/observability-and-logging/metrics).
+The number of connections Prisma Client uses can be viewed using [logging](/orm/prisma-client/observability-and-logging/logging) and built in APIs provided by the Prisma Postgres Driver.
 
 Using the `info` [logging level](/orm/reference/prisma-client-reference#log-levels), you can log the number of connections in a connection pool that are opened when Prisma Client is instantiated.
 
@@ -127,78 +127,6 @@ Note that the output generated by `log: ['info']` can change in any release with
 
 </Admonition>
 
-If you need even more insights into the size of your connection pool and the amount of in-use and idle connection, you can use the [metrics](/orm/prisma-client/observability-and-logging/metrics) feature (which is currently in Preview).
-
-Consider the following example:
-
-<CodeWithResult expanded="{true}">
-<cmd>
-
-```ts
-import { PrismaClient } from '@prisma/client'
-
-const prisma = new PrismaClient()
-
-async function main() {
-  await Promise.all([prisma.user.findMany(), prisma.post.findMany()])
-
-  const metrics = await prisma.$metrics.json()
-  console.dir(metrics, { depth: Infinity })
-}
-
-main()
-```
-
-</cmd>
-<cmdResult>
-
-```json no-copy
-{
-  "counters": [
-    // ...
-    {
-      "key": "prisma_pool_connections_open",
-      "labels": {},
-      "value": 2,
-      "description": "Number of currently open Pool Connections"
-    }
-  ],
-  "gauges": [
-    // ...
-    {
-      "key": "prisma_pool_connections_busy",
-      "labels": {},
-      "value": 0,
-      "description": "Number of currently busy Pool Connections (executing a datasource query)"
-    },
-    {
-      "key": "prisma_pool_connections_idle",
-      "labels": {},
-      "value": 21,
-      "description": "Number of currently unused Pool Connections (waiting for the next datasource query to run)"
-    },
-    {
-      "key": "prisma_pool_connections_opened_total",
-      "labels": {},
-      "value": 2,
-      "description": "Total number of Pool Connections opened"
-    }
-  ],
-  "histograms": [
-    /** ... **/
-  ]
-}
-```
-
-</cmdResult>
-</CodeWithResult>
-
-<Admonition type="info">
-
-For more details on what is available in the metrics output, see the [About metrics](/orm/prisma-client/observability-and-logging/metrics#about-metrics) section.
-
-</Admonition>
-
 ### Connection pool timeout
 
 #### Default pool timeout

content/200-orm/200-prisma-client/300-client-extensions/110-client.mdx

@@ -34,29 +34,25 @@ const prisma = new PrismaClient().$extends({
 The following example uses the `client` component to add two methods to Prisma Client:
 
 - `$log` outputs a message.
-- `$totalQueries` returns the number of queries executed by the current client instance. It uses the [metrics](/orm/prisma-client/observability-and-logging/metrics) feature to collect this information.
+- `$totalQueries` returns the number of queries executed by the current client instance.
 
-<Admonition type="info">
-
-To use metrics in your project, you must enable the `metrics` feature flag in the `generator` block of your `schema.prisma` file. [Learn more](/orm/prisma-client/observability-and-logging/metrics#2-enable-the-feature-flag-in-the-prisma-schema-file).
+```ts
 
-</Admonition>
 
-```ts
+const total = 0
 const prisma = new PrismaClient().$extends({
   client: {
     $log: (s: string) => console.log(s),
-    async $totalQueries() {
-      const index_prisma_client_queries_total = 0
-      // Prisma.getExtensionContext(this) in the following block
-      // returns the current client instance
-      const metricsCounters = await (
-        await Prisma.getExtensionContext(this).$metrics.json()
-      ).counters
-
-      return metricsCounters[index_prisma_client_queries_total].value
-    },
+    async $totalQueries() { return total; },
   },
+  query: {
+      $allModels: {
+        async $allOperations({ query, args }) {
+          total += 1;
+          return query(args);
+        },
+      },
+    },
 })
 
 async function main() {