---
title: Disk space thresholds
description: Replication servers record changes in changelog database files under the opendj/changelogDb directory.
component: pingds
version: 8.1
page_id: pingds:config-guide:repl-disk-space
canonical_url: https://docs.pingidentity.com/pingds/8.1/config-guide/repl-disk-space.html
revdate: 2025-10-22T14:42:39Z
keywords: ["Features", "LDAP", "Replication", "Setup & Configuration", "Troubleshooting"]
---

# Disk space thresholds

Replication servers record changes in changelog database files under the `opendj/changelogDb` directory.

|   |                                                                                                                                                                                                                                                            |
| - | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
|   | Do not compress, tamper with, or otherwise alter changelog database files directly, unless specifically instructed to do so by a qualified technical support engineer.External changes to changelog database files can render them unusable by the server. |

Replication server configuration objects have changelog database properties, `disk-low-threshold`, and `disk-full-threshold`:

* When available disk space falls below `disk-low-threshold`, the replication server triggers a warning alert notification to let you know to free disk space.

* When available disk space falls below `disk-full-threshold`, the replication server triggers another warning alert notification, and *disconnects from the replication topology*.

  Connected directory servers fail over to another replication server until available disk space is above the `disk-full-threshold` again.

Set the thresholds high enough to allow time to react after the initial alert.

The following example sets `disk-low-threshold` to 10 GB and `disk-full-threshold` to 5 GB:

```console
$ dsconfig \
 set-replication-server-prop \
 --provider-name "Multimaster Synchronization" \
 --set "disk-low-threshold:10 GB" \
 --set "disk-full-threshold:5 GB" \
 --hostname localhost \
 --port 4444 \
 --bindDN uid=admin \
 --bindPassword password \
 --trustStorePath /path/to/opendj/config/keystore \
 --trustStoreType PKCS12 \
 --trustStorePassword:file /path/to/opendj/config/keystore.pin \
 --no-prompt
```

The [disk-low-threshold](../configref/objects-replication-server.html#disk-low-threshold) and [disk-full-threshold](../configref/objects-replication-server.html#disk-full-threshold) properties are *advanced* properties. Examine their values with the `dsconfig --advanced` option.