# Operations

> Temporal Cloud limits the number of operations per second per namespace to keep the service reliable. This page lists all those operations.

Temporal Cloud [rate limits operations per second (OPS)](/cloud/limits#operations-per-second) per namespace. An operation is anything 1. a user does directly, or 2. Temporal does on behalf of the user in the background that results in load on Temporal Server. The exception is visibility queries: they do hit the Server (the query is passed from the server to the visibility store), but primarily the load is on the visibility system. Visibility rate limits are separate from OPS rate limits.

Below is the list of operations, including:
- operation name
- description
- priority (foreground is higher priority, background is lower priority)
- effect of that operation being throttled