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chore: even faster max timestamp query #17533

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merged 1 commit into from
Sep 19, 2023
Merged

chore: even faster max timestamp query #17533

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7 changes: 6 additions & 1 deletion posthog/clickhouse/system_status.py
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Original file line number Diff line number Diff line change
Expand Up @@ -103,7 +103,12 @@ def system_status() -> Generator[SystemStatusRow, None, None]:
# This timestamp is a naive timestamp (does not include a timezone)
# ClickHouse always stores timezone agnostic unix timestamp
# See https://clickhouse.com/docs/en/sql-reference/data-types/datetime#usage-remarks
last_event_ingested_timestamp = sync_execute("SELECT max(_timestamp) FROM events")[0][0]
last_event_ingested_timestamp = sync_execute(
"""
SELECT max(_timestamp) FROM events
WHERE timestamp >= now() - INTERVAL 1 HOUR
"""
)[0][0]

# Therefore we can confidently apply the UTC timezone
last_event_ingested_timestamp_utc = last_event_ingested_timestamp.replace(tzinfo=ZoneInfo("UTC"))
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