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> Use this file to discover all available pages before exploring further.

# Fixing the 'Unable to allocate memory for pool' PHP error message

> Learn to fix the "Unable to allocate memory for pool" PHP error with this concise troubleshooting guide.

This article discusses the "Unable to allocate memory for pool" error message in PHP.

## Problem

When you try to view a page running PHP, you receive the following error message:

```text theme={null}
Unable to allocate memory for pool
```

## Resolution

To resolve this problem, our Support team must adjust APC (Alternative PHP Cache) configuration settings for your account. Please open a support ticket at [https://my.hosting.com](https://my.hosting.com). In the ticket, please provide the complete text of the error message you receive, as well as a reference to this Knowledge Base article.

## More information

For more information about APC, please visit [https://www.php.net/manual/en/book.apcu.php](https://www.php.net/manual/en/book.apcu.php).

## Related articles

* [Viewing PHP settings](/docs/view-php-settings)