From 1ff29d8fdee2cd13a1378089c4b931cdff6eda4e Mon Sep 17 00:00:00 2001
From: discord9 <55937128+discord9@users.noreply.github.com>
Date: Fri, 1 Nov 2024 15:10:57 +0800
Subject: [PATCH] chore: short desc markdown about change log level (#4921)

* chore: tiny doc about change log level

* chore: per review

* chore
---
 .../how-to/how-to-change-log-level-on-the-fly.md | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
 create mode 100644 docs/how-to/how-to-change-log-level-on-the-fly.md

diff --git a/docs/how-to/how-to-change-log-level-on-the-fly.md b/docs/how-to/how-to-change-log-level-on-the-fly.md
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+++ b/docs/how-to/how-to-change-log-level-on-the-fly.md
@@ -0,0 +1,16 @@
+# Change Log Level on the Fly
+
+## HTTP API
+
+example:
+```bash
+curl --data "trace;flow=debug" 127.0.0.1:4000/debug/log_level
+```
+And database will reply with something like:
+```bash
+Log Level changed from Some("info") to "trace;flow=debug"%
+```
+
+The data is a string in the format of `global_level;module1=level1;module2=level2;...` that follow the same rule of `RUST_LOG`. 
+
+The module is the module name of the log, and the level is the log level. The log level can be one of the following: `trace`, `debug`, `info`, `warn`, `error`, `off`(case insensitive).
\ No newline at end of file