> For the complete documentation index, see [llms.txt](https://mariadb.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mariadb.com/docs/gridgain/gridgain-8/gridgain8-management/cluster-maintenance.md).

# Cluster Maintenance

Keep a running GridGain cluster healthy — control the CPU and memory a node uses, reclaim disk space through persistence defragmentation, and isolate a node in maintenance mode.

{% columns %}
{% column %}
{% content-ref url="/pages/n5abZsgUo1N74HhA1BtA" %}
[GridGain Resource Control](/docs/gridgain/gridgain-8/gridgain8-management/cluster-maintenance/resource-control.md)
{% endcontent-ref %}
{% endcolumn %}

{% column %}
How to limit the CPU and memory a GridGain node uses on Linux with systemd, Docker, and taskset/cpuset to control the licensed core footprint.
{% endcolumn %}
{% endcolumns %}

{% columns %}
{% column %}
{% content-ref url="/pages/eldOeIvXcTQdNIwmlUIR" %}
[Persistence Defragmentation](/docs/gridgain/gridgain-8/gridgain8-management/cluster-maintenance/persistence-defragmentation.md)
{% endcontent-ref %}
{% endcolumn %}

{% column %}
How to reclaim disk space from GridGain persistent storage by scheduling and running defragmentation on cluster nodes with the control script.
{% endcolumn %}
{% endcolumns %}

{% columns %}
{% column %}
{% content-ref url="/pages/tK5rRdz0V4zblGQQo1va" %}
[Maintenance Mode](/docs/gridgain/gridgain-8/gridgain8-management/cluster-maintenance/maintenance-mode.md)
{% endcontent-ref %}
{% endcolumn %}

{% column %}
How GridGain nodes enter maintenance mode, the conditions that trigger it, and the operations available while a node is isolated from the cluster.
{% endcolumn %}
{% endcolumns %}