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cockroachdb_used_storage_capacity

cockroachdb_used_storage_capacity

Database | CockroachDB

This alert presents the percentage of used storage space.
If you receive this alert, then there is high storage capacity utilization from CockroachDB.

  • This alert is raised to warning when the metric exceeds 85%.
  • If the percentage of used storage space exceeds 95%, then the alert is raised to critical.

Definition of “size” on CockroachDB:

The maximum size allocated to the node. When this size is reached, CockroachDB attempts to
rebalance data to other nodes with available capacity. When there’s no capacity elsewhere,
this limit will be exceeded. Also, data may be written to the node faster than the cluster
can rebalance it away; in this case, as long as capacity is available elsewhere, CockroachDB
will gradually rebalance data down to the store limit.1

References and Sources
  1. CockroachDB Size
  2. CockroachDB Docs

Troubleshooting Section

Increase the space available for CockroachDB data

If you had previously set a limit, then you can use the option --store=path<YOUR PATH>,size=<SIZE>
to increase the amount of available space.
Make sure to replace the “YOUR PATH” with the actual store path and “SIZE” with the new size you want to set CockroachDB to.

Note: If you haven’t set a limit on the size, then the entire drive’s size will be used. In this
case, you will see that the drive is full. Clearing some space or upgrading to a drive with a
larger capacity are potential solutions.