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Marc-André BombeckandClaude Opus 4.7
5d1ece1fd5
Adds the per-minute snapshot table that backs the new admin host-load
chart above /admin/system-status. One row per minute, captured by the
pg-boss sampler in the next commit, with 7-day retention enforced
inside the worker so the table stays under a few thousand rows.
Schema mirrors what the chart needs:
- load_avg_1/5/15 (DOUBLE PRECISION) — os.loadavg() output
- mem_used_bytes / mem_total_bytes — derived from os.totalmem() and
os.freemem(), kept as raw bytes so the API can compute either a
percent or a MiB delta downstream
- disk_read_bytes / disk_write_bytes — nullable cumulative byte
counters from /proc/diskstats. NULL on macOS/Windows dev hosts;
Linux production picks them up automatically. The API endpoint
converts deltas to bytes-per-second between samples
Indexed by captured_at so the "last 2 hours" query stays index-only.
Migration 0032_host_metric. integration setup.ts adds host_metrics to
the truncate list so testcontainers stays clean across runs.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
32 lines
1.3 KiB
SQL
32 lines
1.3 KiB
SQL
-- v1.4.16 phase B3: per-minute host-load snapshot table.
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--
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-- The admin /system-status section now renders a 2-hour host-load chart
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-- above the existing facts grid (Marc: "über dem Systemstatus vielleicht
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-- nochmal so ein Graf der Auslastung des Hosts der letzten zwei Stunden").
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--
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-- A pg-boss `host-metric-sample` job inserts one row per minute carrying
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-- `os.loadavg()` (1/5/15-minute) + `os.totalmem() - os.freemem()` and,
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-- on Linux, a rolling cumulative byte counter from /proc/diskstats.
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-- Disk fields are nullable so non-Linux dev hosts keep working.
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--
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-- Retention: 7 days, enforced inside the sampler at the end of each
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-- tick. Indexed by `captured_at` so the API's `WHERE captured_at >=
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-- now() - 2h ORDER BY captured_at` query is index-only.
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CREATE TABLE "host_metrics" (
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"id" TEXT NOT NULL,
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"captured_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
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"load_avg_1" DOUBLE PRECISION NOT NULL,
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"load_avg_5" DOUBLE PRECISION NOT NULL,
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"load_avg_15" DOUBLE PRECISION NOT NULL,
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"mem_used_bytes" BIGINT NOT NULL,
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"mem_total_bytes" BIGINT NOT NULL,
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"disk_read_bytes" BIGINT,
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"disk_write_bytes" BIGINT,
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CONSTRAINT "host_metrics_pkey" PRIMARY KEY ("id")
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);
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CREATE INDEX "host_metrics_captured_at_idx"
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ON "host_metrics" ("captured_at");
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