Memantau tabel temporal versi sistem yang dioptimalkan memori

Berlaku untuk: SQL Server 2016 (13.x) dan versi yang lebih baru Azure SQL Managed Instance

Anda dapat menggunakan tampilan yang ada untuk melacak konsumsi memori terperinci dan ringkasan untuk setiap tabel yang dioptimalkan memori versi sistem.

Memantau tabel temporal

Gunakan kode contoh berikut untuk memantau tabel temporal yang menggunakan OLTP dalam memori. Contoh-contoh ini menggunakan ekspresi tabel umum (CTE).

Konsumsi memori terperinci

Kueri berikut merinci konsumsi memori, yang dibagi berdasarkan tabel penahapan utama versi sistem dan tabel penahapan riwayat internal.

WITH InMemoryTemporalTables
AS (SELECT SCHEMA_NAME(t1.schema_id) AS TemporalTableSchema,
           t1.object_id AS TemporalTableObjectId,
           t1.object_id AS InternalTableObjectId,
           OBJECT_NAME(t1.parent_object_id) AS TemporalTableName,
           t1.Name AS InternalHistoryStagingName
    FROM sys.internal_tables AS t1
         INNER JOIN sys.tables AS t1
             ON t1.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 AS ConsumedBy,
       c.*
FROM sys.dm_db_xtp_memory_consumers AS c
     INNER JOIN InMemoryTemporalTables AS t
         ON c.object_id = t.TemporalTableObjectId
         OR c.object_id = t.InternalTableObjectId
WHERE t.TemporalTableSchema = 'dbo'
      AND t.TemporalTableName = 'FXCurrencyPairs';

Ringkasan konsumsi memori

Kueri berikut ini meringkas konsumsi memori, dengan total untuk tabel yang dioptimalkan memori versi sistem.

;WITH InMemoryTemporalTables
AS (
    SELECT SCHEMA_NAME(t1.schema_id) AS TemporalTableSchema,
        t1.object_id AS TemporalTableObjectId,
        t1.object_id AS InternalTableObjectId,
        OBJECT_NAME(t1.parent_object_id) AS TemporalTableName,
        t1.Name AS InternalHistoryStagingName
    FROM sys.internal_tables t1
    INNER JOIN sys.tables t1
        ON t1.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 AS ConsumedBy,
        c.*
    FROM sys.dm_db_xtp_memory_consumers c
    INNER 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;

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