# Execution profiles

Execution profiles are a way to group various query execution configuration options together. Profiles can be created to represent different workloads, which can be run conveniently on a single session.

The settings that an execution profile encapsulates are [as follows](https://rust-driver.docs.scylladb.com/v1.5.0/execution-profiles/maximal-example.md):

* consistency
* serial consistency
* request timeout
* load balancing policy
* retry policy
* speculative execution policy

There are two classes of objects related to execution profiles: `ExecutionProfile` and `ExecutionProfileHandle`. The former is simply an immutable set of the settings. The latter is a handle that at particular moment points to some `ExecutionProfile` (but during its lifetime, it can change the profile it points at). Handles are assigned to `Sessions` and `Statements`.<br />
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At any moment, handles [can be remapped](https://rust-driver.docs.scylladb.com/v1.5.0/execution-profiles/remap.md) to point to another `ExecutionProfile`. This allows convenient switching between workloads for all `Sessions` and/or `Statements` that, for instance, share common characteristics.