bvandeusenandClaude Opus 5.5
177ea12c9b
#6727 "A metric that bursts now and then opens anomalies at hours whose usual peak reads 0". usual_peak is the p90 of a slot's hourly max, so a metric that bursts in under about 1 hour in 10 reads 0 there however often it bursts across the day. #6723 "An anomaly opens on a burst of minutes inside the metric's usual peak, so most rows aren't outside the norm" therefore still opened on those. usual_anywhere is the median, across the hours of the day, of each hour's highest peak. Height is now judged against the greater of it and the slot's usual peak. Bursts at any hour lift the median; a job at a time of its own raises a few hours and leaves it low, so the same level at another time of day is still an anomaly, as System 182 rules. A held level still opens. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
24 lines
672 B
Python
24 lines
672 B
Python
"""Metric normals: how high a metric has gone in most hours of the day.
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Revision ID: 0050_norm_usual_anywhere
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Revises: 0049_alert_on_a_rise
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Create Date: 2026-10-30
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"""
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from typing import Sequence, Union
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import sqlalchemy as sa
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from alembic import op
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revision: str = "0050_norm_usual_anywhere"
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down_revision: Union[str, None] = "0049_alert_on_a_rise"
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branch_labels: Union[str, Sequence[str], None] = None
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depends_on: Union[str, Sequence[str], None] = None
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def upgrade() -> None:
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op.add_column("metric_norms", sa.Column("usual_anywhere", sa.Float, nullable=False, server_default="0"))
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def downgrade() -> None:
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op.drop_column("metric_norms", "usual_anywhere")
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