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Graph the artwork thrown out, not the artwork kept (#198)

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The sweep trims the cache to its limit, so the kept bytes it reports are the
limit every time once the cache has filled: the panel was two lines flat at
500 MiB. A counter of images thrown out says whether the limit is too small.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Ray Slakinski
2026-10-11 20:15:11 +00:00
parent 12fadbd0f8
commit f032d50ed3
5 changed files with 13 additions and 4 deletions
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grafana/dashboard.py
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@@ -187,8 +187,10 @@ ts("Backlogs", [prom('max(ipx_deadair_backlog{job="ipx"})', legend="DeadAir to l
y += 8
ts("DeadAir on a file", [prom('max(ipx_deadair_busy_seconds{job="ipx"})', legend="for")], 0, w=12, unit="s",
desc="How long DeadAir has been on the file it is analysing; a few seconds each.")
ts("Artwork kept", [prom('max(ipx_art_cache_bytes{job="ipx"})', legend="kept"),
prom('max(ipx_art_cache_limit_bytes{job="ipx"})', ref="B", legend="the most kept")], 12, w=12, unit="bytes")
ts("Artwork thrown out", [prom('sum(increase(ipx_art_trimmed_total{job="ipx"}[$__rate_interval]))', legend="images")],
12, w=12, bars=True,
desc="What is kept sits at its limit (500 MiB unless changed), since each sweep trims the least recently used to fit. "
"Many thrown out at every sweep means the limit is too small and artwork is fetched again.")
y += 8
# ---- Traces