Export cache, eviction, upstream and transform metrics (closes #85)

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Author	SHA1	Message	Date
sneak	fa2ec3da6a	Export cache, eviction, upstream and transform metrics (closes #85 ) check / check (push) Canceled after 0s Details New pixa_ metrics, none with labels: - source cache hits and misses, counted once per variant made or checked; a source whose cached file cannot be used is a miss - cache usage and limit gauges; usage is set each time eviction reads it - eviction count and bytes, from the size_bytes the deleted row returns - upstream fetch duration histogram and fetch error counter - transform duration histogram and an in-progress gauge, both including the wait for a processing slot Removing a damaged file during reconciliation is not counted as an eviction. README lists every metric; the metrics config comment now says the pixa_ metrics are measured whether or not /metrics is served. Model: opus-5-5	2026-11-11 14:32:38 +00:00
sneak	a041e73550	Test the eviction, source cache, upstream and transform metrics The tests check the metrics on a variant hit, on misses that fetch or use the cached source, on a failed fetch, and on both kinds of eviction. A source whose cached file is gone must count as a source cache miss. A transform waiting for a processing slot must count as in progress. The tests fail until the metrics exist. Model: opus-5-5	2026-11-11 14:31:03 +00:00

Author

SHA1

Message

Date

sneak

fa2ec3da6a

Export cache, eviction, upstream and transform metrics (closes #85 )

check / check (push) Canceled after 0s

Details

New pixa_ metrics, none with labels:
- source cache hits and misses, counted once per variant made or checked;
  a source whose cached file cannot be used is a miss
- cache usage and limit gauges; usage is set each time eviction reads it
- eviction count and bytes, from the size_bytes the deleted row returns
- upstream fetch duration histogram and fetch error counter
- transform duration histogram and an in-progress gauge, both including
  the wait for a processing slot

Removing a damaged file during reconciliation is not counted as an
eviction. README lists every metric; the metrics config comment now says
the pixa_ metrics are measured whether or not /metrics is served.

Model: opus-5-5

2026-11-11 14:32:38 +00:00

sneak

a041e73550

Test the eviction, source cache, upstream and transform metrics

The tests check the metrics on a variant hit, on misses that fetch or use
the cached source, on a failed fetch, and on both kinds of eviction. A
source whose cached file is gone must count as a source cache miss. A
transform waiting for a processing slot must count as in progress. The
tests fail until the metrics exist.

Model: opus-5-5

2026-11-11 14:31:03 +00:00

Export cache, eviction, upstream and transform metrics (closes #85) #353