Grafana+Loki Unable to View Old Logs

Hi There,

I am unable to view the pod logs in grafana UI using loki datasource older than 5-10 mins ago (using explore mode).
There is a need in our team to fetch older logs

Things I tried :

  1. Updated loki.yaml with “max_entries_limit_per_query” more than 10 lakh count ( so number of lines shouldnt be an issue)
  2. Updated loki.yaml with “table_manager.retention_period=336h”

Is there any thing else need to be configured ?
Any help is really appreciated to resolve this.

Please find attached screenshot.