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Optimize Lite query store collector: CTE + 60min window #137

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Merged
erikdarlingdata merged 1 commit into from
Feb 19, 2026
Merged

Optimize Lite query store collector: CTE + 60min window #137

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75 changes: 48 additions & 27 deletions Lite/Services/RemoteCollectorService.QueryStore.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -81,36 +81,57 @@ ORDER BY d.name
EXECUTE [{dbName.Replace("]", "]]")}].sys.sp_executesql
N'SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;

SELECT TOP (100)
query_id = qsq.query_id,
plan_id = qsp.plan_id,
;WITH ranked AS
(
SELECT TOP (100)
query_id = qsq.query_id,
plan_id = qsp.plan_id,
query_text_id = qsq.query_text_id,
query_hash = qsq.query_hash,
query_plan_hash = qsp.query_plan_hash,
execution_count = SUM(qsrs.count_executions),
avg_duration_ms = CONVERT(decimal(18,2), AVG(qsrs.avg_duration) / 1000.0),
avg_cpu_time_ms = CONVERT(decimal(18,2), AVG(qsrs.avg_cpu_time) / 1000.0),
avg_logical_reads = CONVERT(decimal(18,2), AVG(qsrs.avg_logical_io_reads)),
avg_logical_writes = CONVERT(decimal(18,2), AVG(qsrs.avg_logical_io_writes)),
avg_physical_reads = CONVERT(decimal(18,2), AVG(qsrs.avg_physical_io_reads)),
avg_rowcount = CONVERT(decimal(18,2), AVG(qsrs.avg_rowcount)),
last_execution_time = MAX(qsrs.last_execution_time),
total_duration = SUM(qsrs.avg_duration * qsrs.count_executions)
FROM sys.query_store_query AS qsq
JOIN sys.query_store_plan AS qsp
ON qsp.query_id = qsq.query_id
JOIN sys.query_store_runtime_stats AS qsrs
ON qsrs.plan_id = qsp.plan_id
WHERE qsrs.last_execution_time >= DATEADD(MINUTE, -60, SYSDATETIME())
GROUP BY
qsq.query_id,
qsp.plan_id,
qsq.query_text_id,
qsq.query_hash,
qsp.query_plan_hash
ORDER BY
total_duration DESC
)
SELECT
r.query_id,
r.plan_id,
query_text = qst.query_sql_text,
query_hash = CONVERT(varchar(64), qsq.query_hash, 1),
execution_count = SUM(qsrs.count_executions),
avg_duration_ms = CONVERT(decimal(18,2), AVG(qsrs.avg_duration) / 1000.0),
avg_cpu_time_ms = CONVERT(decimal(18,2), AVG(qsrs.avg_cpu_time) / 1000.0),
avg_logical_reads = CONVERT(decimal(18,2), AVG(qsrs.avg_logical_io_reads)),
avg_logical_writes = CONVERT(decimal(18,2), AVG(qsrs.avg_logical_io_writes)),
avg_physical_reads = CONVERT(decimal(18,2), AVG(qsrs.avg_physical_io_reads)),
avg_rowcount = CONVERT(decimal(18,2), AVG(qsrs.avg_rowcount)),
last_execution_time = MAX(qsrs.last_execution_time),
query_plan_hash = CONVERT(varchar(64), qsp.query_plan_hash, 1)
FROM sys.query_store_query AS qsq
query_hash = CONVERT(varchar(64), r.query_hash, 1),
r.execution_count,
r.avg_duration_ms,
r.avg_cpu_time_ms,
r.avg_logical_reads,
r.avg_logical_writes,
r.avg_physical_reads,
r.avg_rowcount,
r.last_execution_time,
query_plan_hash = CONVERT(varchar(64), r.query_plan_hash, 1)
FROM ranked AS r
JOIN sys.query_store_query_text AS qst
ON qst.query_text_id = qsq.query_text_id
JOIN sys.query_store_plan AS qsp
ON qsp.query_id = qsq.query_id
JOIN sys.query_store_runtime_stats AS qsrs
ON qsrs.plan_id = qsp.plan_id
WHERE qsrs.last_execution_time >= DATEADD(HOUR, -24, SYSDATETIME())
GROUP BY
qsq.query_id,
qsp.plan_id,
qst.query_sql_text,
qsq.query_hash,
qsp.query_plan_hash
ON qst.query_text_id = r.query_text_id
ORDER BY
SUM(qsrs.avg_duration * qsrs.count_executions) DESC
r.total_duration DESC
OPTION(RECOMPILE);';";

sqlSw.Start();
Expand Down