Checked the issue and found the node’s filesystem is full. Backups are running fine, so it’s not related to backup activity. The main reason seems to be high WAL generation, possibly due to heavy DML or data load activity.
Please review the filesystem usage as part of morning checks to catch such issues early.
If large data loads are being done, consider using unlogged tables for non-critical data so that WALs don’t pile up.
Also, it’s a good idea to keep an eye on space usage and perform periodic VACUUM/REINDEX to control bloat.
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