# Striim Cloud4.1.0 documentation

## What's new in Striim Cloud 4.1.0

The following features are new in this release.

### Programming, administration, and operations

• Striim 4.1.0 uses the G1 Garbage Collector (previous releases used the Concurrent Mark Sweep (CMS) collector). The monitor and memory utilities may show less free memory than in previous releases, but that is due to G1 freeing memory for use by applications only when it is needed. If you experience memory issues after upgrading to this release, you may switch to CMS by editing startUp.properties to set GC=cms and restarting Striim.

• A HashiCorp vault may be configured to automatically renew its token (see Using vaults).

• Applications can send alerts to Slack (see Sending alerts from applications).