# Tenzir Node v4.18.3

## 🔧 Changes

### Prevent unbounded memory usage in `export --live`

Jul 16, 2024 · [@dominiklohmann](https://github.com/dominiklohmann) · [#4396](https://github.com/tenzir/tenzir/pull/4396)

`metrics export` now includes an additional field that shows the number of queued events in the pipeline.

## 🐞 Bug Fixes

### Prevent unbounded memory usage in `export --live`

Jul 16, 2024 · [@dominiklohmann](https://github.com/dominiklohmann) · [#4396](https://github.com/tenzir/tenzir/pull/4396)

We fixed a bug that caused a potentially unbounded memory usage in `export --live`, `metrics --live`, and `diagnostics --live`.

### Use `append_array_slice` everywhere

Jul 16, 2024 · [@jachris](https://github.com/jachris) · [#4394](https://github.com/tenzir/tenzir/pull/4394)

Fixed an issue where `null` records were sometimes transformed into non-null records with `null` fields.

We fixed an issue that sometimes caused `subscribe` to fail when multiple `publish` operators pushed to the same topic at the exact same time.

[ Download on GitHub ](https://github.com/tenzir/tenzir/releases/tag/v4.18.3)

[Get the release artifacts and source code.](https://github.com/tenzir/tenzir/releases/tag/v4.18.3)