> For the complete documentation index, see [llms.txt](https://tailwindsdocs.innovativesol.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://tailwindsdocs.innovativesol.com/readme/chatflows/langchain/memory/buffer-memory.md).

# Buffer Memory

<figure><img src="/files/LwE7aeRX7VpzrgpYkom4" alt="" width="299"><figcaption></figcaption></figure>

## Input

| Parameter  | Description                                                                   | Default       |
| ---------- | ----------------------------------------------------------------------------- | ------------- |
| Session Id | An ID to retrieve/store messages. If not specified, a random ID will be used. |               |
| Memory Key | A key used to format messages in prompt template                              | chat\_history |