hi Everyone.We have signoz installed but i am not abl to change the logs and traces retention period from UI(Settings).Is there any way we can change it from backend or so?

Updating TTL for ClickHouse is a resource intensive operation in general. You would either want to temporarily increase the resources allotted to machine/pod where SigNoz ClickHouse is running. Or you could disable the ingestion and after the resource usage settles before proceeding with the TTL updation.