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monitoring-memory-optimized-system-versioned-temporal-tables.md

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title Monitoring Memory-Optimized System-Versioned Temporal Tables | Microsoft Docs
ms.custom
ms.date 03/28/2016
ms.prod sql
ms.prod_service database-engine
ms.reviewer
ms.technology table-view-index
ms.topic conceptual
ms.assetid 7a06785d-dbcb-44de-b95c-26b131471bee
author CarlRabeler
ms.author carlrab
monikerRange =azuresqldb-current||>=sql-server-2016||=sqlallproducts-allversions||>=sql-server-linux-2017||=azuresqldb-mi-current

Monitoring Memory-Optimized System-Versioned Temporal Tables

[!INCLUDEtsql-appliesto-ss2016-asdb-xxxx-xxx-md]

You can use existing views to track detailed and summarized memory consumption for every system-versioned memory-optimized table.

Detailed memory consumption (split per main system-versioned and internal history staging table):

--Details of memory consumption
WITH InMemoryTemporalTables
AS
   (
      SELECT SCHEMA_NAME ( T1.schema_id ) AS TemporalTableSchema
         , T1.object_id AS TemporalTableObjectId
         , IT.object_id AS InternalTableObjectId
         , OBJECT_NAME ( IT.parent_object_id ) AS TemporalTableName
         , IT.Name AS InternalHistoryStagingName
      FROM sys.internal_tables IT
      JOIN sys.tables T1 ON IT.parent_object_id = T1.object_id
      WHERE T1.is_memory_optimized = 1 AND T1.temporal_type = 2
   )
SELECT
   TemporalTableSchema
   , T.TemporalTableName
   , T.InternalHistoryStagingName,
      CASE
         WHEN C.object_id = T.TemporalTableObjectId
         THEN 'Temporal Table Consumption'
         ELSE 'Internal Table Consumption'
         END ConsumedBy
   , C.*
FROM sys.dm_db_xtp_memory_consumers C
JOIN InMemoryTemporalTables T
   ON C.object_id = T.TemporalTableObjectId OR C.object_id = T.InternalTableObjectId
   WHERE T.TemporalTableSchema = 'dbo' AND T.TemporalTableName = 'FXCurrencyPairs'
;

Summary of memory consumption (total for a system-versioned memory-optimized table):

--Summary of memory consumption
WITH InMemoryTemporalTables
AS
   (
      SELECT SCHEMA_NAME ( T1.schema_id ) AS TemporalTableSchema
         , T1.object_id AS TemporalTableObjectId
         , IT.object_id AS InternalTableObjectId
         , OBJECT_NAME ( IT.parent_object_id ) AS TemporalTableName
         , IT.Name AS InternalHistoryStagingName
      FROM sys.internal_tables IT
      JOIN sys.tables T1 ON IT.parent_object_id = T1.object_id
      WHERE T1.is_memory_optimized = 1 AND T1.temporal_type = 2
   )
, DetailedConsumption
AS
(
   SELECT TemporalTableSchema
      , T.TemporalTableName
      , T.InternalHistoryStagingName
      , CASE
         WHEN C.object_id = T.TemporalTableObjectId
         THEN 'Temporal Table Consumption'
         ELSE 'Internal Table Consumption'
         END ConsumedBy
      , C.*
   FROM sys.dm_db_xtp_memory_consumers C
   JOIN InMemoryTemporalTables T
   ON C.object_id = T.TemporalTableObjectId OR C.object_id = T.InternalTableObjectId
)
SELECT TemporalTableSchema
   TemporalTableName
   , sum ( allocated_bytes ) AS allocated_bytes
   , sum ( used_bytes ) AS used_bytes
FROM DetailedConsumption
WHERE TemporalTableSchema = 'dbo' ANDTemporalTableName = 'FXCurrencyPairs'
GROUP BY TemporalTableSchema, TemporalTableName
;

See Also