> Source: [sk184407](https://support.checkpoint.com/results/sk/sk184407)

# sk184407 - PDPD process stops responding when memory usage exceeds 4GB on a Security Gateway

| Property | Value |
|----------|-------|
| Solution ID | sk184407 |
| Date Created | 2025-12-08 |
| Last Modified | 2026-07-23 |
| Technical Level | Advanced |
| Products | Security Gateway |
| Versions | R82.10, R82, R81.20 |
| OS | Gaia |

## Symptoms

- * Users cannot authenticate through the Identity Awareness blade.

* Identity-based rules do not match the traffic.

* On the Security Gateway CLI, `pdp` commands return:  
  `daemon did not respond or not running`

* The command `ps aux |grep pdpd` shows the PDPD process uses more than 4GB of memory (VSZ column).

* The last line in ` $FWDIR/log/pdpd.elg` shows:  
  `Cannot allocate memory`

* A forced restart of the PDPD process with the command `kill -9 $(pidof pdpd)` resolves the issue for a short time only.

## Solution

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