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docs: how to get jeprof from target dir

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evenyag
2024-11-14 14:21:48 +08:00
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docs/how-to/how-to-profile-memory.md
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@@ -4,6 +4,18 @@ This crate provides an easy approach to dump memory profiling info.
## Prerequisites
### jemalloc
jeprof is already compiled in the target directory of GreptimeDB. You can find the binary and use it.
```
# find jeprof binary
find . -name 'jeprof'
# add executable permission
chmod +x <path_to_jeprof>
```
The path is usually under `./target/${PROFILE}/build/tikv-jemalloc-sys-${HASH}/out/build/bin/jeprof`.
The default version of jemalloc installed from the package manager may not have the `--collapsed` option.
You may need to check the whether the `jeprof` version is >= `5.3.0` if you want to install it from the package manager.
```bash
# for macOS
brew install jemalloc