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https://github.com/oven-sh/bun
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37 lines
737 B
Plaintext
37 lines
737 B
Plaintext
---
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title: Metrics
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description: Monitor server activity with built-in metrics
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---
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### `server.pendingRequests` and `server.pendingWebSockets`
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Monitor server activity with built-in counters:
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```ts
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const server = Bun.serve({
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fetch(req, server) {
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return new Response(
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`Active requests: ${server.pendingRequests}\n` + `Active WebSockets: ${server.pendingWebSockets}`,
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);
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},
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});
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```
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### `server.subscriberCount(topic)`
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Get count of subscribers for a WebSocket topic:
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```ts
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const server = Bun.serve({
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fetch(req, server) {
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const chatUsers = server.subscriberCount("chat");
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return new Response(`${chatUsers} users in chat`);
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},
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websocket: {
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message(ws) {
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ws.subscribe("chat");
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},
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},
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});
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```
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