Tag: Storage

Loki ingester encounters "object too large for cache" errors when attempting to store log entries exceeding memcache's configured size limit (typically 1MB). Large log lines remain in the ingester buffer causing continuous failed ingest attempts, pod health degradation, and eventual recycling.The accumulation of oversized entries can lead to buffer exhaustion and ingester instability.

Loki compactor encounters schema configuration mismatches when it finds index tables in object storagethat don't correspond to any configured schema period in the Loki configuration. This causes the compactorto skip compaction for those tables, leading to storage inefficiency and potential query performance degradation.The issue typically occurs after schema migrations, configuration changes, or when legacy data exists withdifferent table naming conventions.

Loki ingester reports memcached errors indicating out-of-memory conditions while cachingobjects, logging messages such as "SERVER_ERROR out of memory storing object". When thisoccurs, cache writes fail and can lead to degraded ingestion performance, retries, andincreased memory pressure on the ingester.