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Update logs.md #201

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Dec 1, 2023
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Update logs.md #201

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31 changes: 23 additions & 8 deletions deploy/manual/logs.md
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# Application logging

Applications can generate logs at runtime using the console API. These logs can
be viewed in real time by navigating to the `Logs` panel of a project or
deployment. Logs will be streamed directly from an application to the log panel.
Applications can generate logs at runtime using the console API, with methods
such as `console.log`, `console.error`, etc. These logs can be viewed in real
time by either:

Logs are retained for a period of 24 hours. To view persisted logs, switch from
`Live` to either `Recent` or `Custom` in the dropdown menu next to the search
box. Logs older than 24 hours are automatically deleted from the system.
- Navigating to the `Logs` panel of a project or deployment.
- Using the `logs` subcommand in
[deployctl](https://docs.deno.com/deploy/manual/deployctl).

Log messages have a maximum size of 2kb. Messages larger than this are trimmed
to 2kb.
Logs will be streamed directly from the application to the log panel or
displayed in `deployctl logs`.

In addition to real-time logs, logs are also retained for a certain duration,
which depends on the subscription plan you are on. To view persisted logs, you
can:

- If you are using the log panel in your browser, switch from `Live` to either
`Recent` or `Custom` in the dropdown menu next to the search box.
- If you prefer the command line, add `--since=<DATETIME>` and/or
`--until=<DATETIME>` to your `deployctl logs` command. For more details,
consult `deployctl logs --help`.

Logs older than the retention period are automatically deleted from the system.

Log messages have a maximum size of 2KB. Messages larger than this limit are
trimmed to 2KB.