You have an enterprise data warehouse in Azure Synapse Analytics named DW1 on a server named Server1.
You need to verify whether the size of the transaction log file for each distribution of DW1 is smaller than 160 GB.
What should you do?
A . On the master database, execute a query against the
sys.dm_pdw_nodes_os_performance_counters dynamic management view.
B . From Azure Monitor in the Azure portal, execute a query against the logs of DW1.
C . On DW1, execute a query against the sys.database_files dynamic management view.
D . Execute a query against the logs of DW1 by using the Get-AzOperationalInsightSearchResult PowerShell cmdlet.
Answer: A
Explanation:
The following query returns the transaction log size on each distribution. If one of the log files is reaching 160 GB, you should consider scaling up your instance or limiting your transaction size.
— Transaction log size
SELECT
instance_name as distribution_db,
cntr_value*1.0/1048576 as log_file_size_used_GB, pdw_node_id
FROM sys.dm_pdw_nodes_os_performance_counters
WHERE
instance_name like ‘Distribution_%’
AND counter_name = ‘Log File(s) Used Size (KB)’
References: https://docs.microsoft.com/en-us/azure/sql-data-warehouse/sql-data-warehouse-manage-monitor
Comments (2)
C.
No it’s a.
Query:
— Transaction log size
SELECT
instance_name as distribution_db,
cntr_value*1.0/1048576 as log_file_size_used_GB,
pdw_node_id
FROM sys.dm_pdw_nodes_os_performance_counters
WHERE
instance_name like ‘Distribution_%’
AND counter_name = ‘Log File(s) Used Size (KB)’