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sys.elastic_pool_resource_stats (Azure SQL Database)

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Applies to: Azure SQL Database

Returns resource usage statistics for all the elastic pools in an Azure SQL Database logical server. For each elastic pool, there is one row for each 15-second reporting window (four rows per minute). This includes CPU, IO, Log, storage consumption and concurrent request/session utilization by all databases in the pool. This data is retained for 14 days.

Column name Data type Description
start_time datetime2 UTC time indicating the start of the 15-second reporting interval.
end_time datetime2 UTC time indicating the end of the 15-second reporting interval.
elastic_pool_name nvarchar(128) Name of the elastic database pool.
avg_cpu_percent decimal(5,2) Average compute utilization in percentage of the limit of the pool.
avg_data_io_percent decimal(5,2) Average I/O utilization in percentage based on the limit of the pool.
avg_log_write_percent decimal(5,2) Average write resource utilization in percentage of the limit of the pool.
avg_storage_percent decimal(5,2) Average storage utilization in percentage of the storage limit of the pool.
max_worker_percent decimal(5,2) Maximum concurrent workers (requests) in percentage based on the limit of the pool.
max_session_percent decimal(5,2) Maximum concurrent sessions in percentage based on the limit of the pool.
elastic_pool_dtu_limit int Current max elastic pool DTU setting for this elastic pool during this interval.
elastic_pool_storage_limit_mb bigint Current max elastic pool storage limit setting for this elastic pool in megabytes during this interval.
max_xtp_storage_percent decimal(5,2) Maximum storage utilization for In-Memory OLTP as a percentage of pool limit at the end of the reporting interval. This includes memory used for storage of the following In-Memory OLTP objects: memory-optimized tables, indexes, and table variables. It also includes memory used for processing ALTER TABLE operations on memory-optimized tables.

Returns 0 if In-Memory OLTP is not used in any database in the elastic pool.
avg_login_rate_percent decimal(5,2) Identified for informational purposes only. Not supported. Future compatibility is not guaranteed.
avg_instance_cpu_percent decimal(5,2) Average CPU usage for the database as a percentage of the pool limit at the end of the reporting interval. Includes CPU utilization by both user and internal workloads.
avg_instance_memory_percent decimal(5,2) Average database memory usage as a percentage of the pool limit at the end of the reporting interval.
elastic_pool_cpu_limit decimal(5,2) Identified for informational purposes only. Not supported. Future compatibility is not guaranteed.
avg_allocated_storage_percent decimal(5,2) The percentage of data space allocated by all databases in the elastic pool. This is the ratio of data space allocated to data max size for the elastic pool. For more information, visit File space management in SQL Database.

Remarks

This view exists in the master database of the logical server. You must be connected to the master database to query sys.elastic_pool_resource_stats.

Permissions

Requires membership in the dbmanager role.

Examples

The following example returns resource utilization data ordered by the most recent time for all the elastic database pools in the current SQL Database logical server.

SELECT start_time, end_time, elastic_pool_name, avg_cpu_percent, avg_data_io_percent,
    avg_log_write_percent, avg_storage_percent, max_worker_percent, max_session_percent,
    elastic_pool_dtu_limit, elastic_pool_storage_limit_mb, avg_allocated_storage_percent
FROM sys.elastic_pool_resource_stats
ORDER BY end_time DESC;

The following example calculates the average DTU percentage consumption for a given pool. Replace <your pool name> with the name of your pool before running the query:

SELECT 
    start_time, 
    end_time,
    (SELECT Max(v)
        FROM (VALUES (avg_cpu_percent), (avg_data_io_percent), (avg_log_write_percent)) AS value(v)
        ) AS [avg_DTU_percent]
FROM sys.elastic_pool_resource_stats
WHERE elastic_pool_name = '<your pool name>'
ORDER BY end_time DESC;

Next steps

Learn more about elastic pools and related concepts in the following articles: