https://medium.com/me/stats/post/220acab20d13
What the Numbers Looked Like in the End
We made all these changes in a single session. Here’s the before and after:
| What we measured | Before | After |
|------------------------------|-------------|-----------------------------|
| Chunk cache hit rate | 7.1% | 39% → 60%+ (still warming) |
| Idle chunk flushes | 55% | 0% |
| Properly-sized chunk flushes | 7% | 47% |
| S3 GETs (since restart) | 1,298,510 | 176,352 — 86% reduction |
| Max query lookback | 30 days | Unlimited |
| Log loss during Loki restart | Yes | Zero — disk buffer |
| Context cancellation errors | Frequent | Gone |