This AAG Database State monitoring Script could be added as a step in a SQL job that runs frequently to check the status of AAG Database Synchronization.
declare @subject varchar(100)
declare @xml nvarchar(max)
declare @body nvarchar(max)
set nocount on
Create table #output(InstName varchar(50),
AGName varchar(50),
DBName varchar(50),
[State] varchar(20)
)
insert into #output(InstName, AGName, DBName, [State])
select @@servername, ag.[name], sd.[name], hdrs.synchronization_state_desc
from sys.availability_groups ag join sys.dm_hadr_availability_group_states hags
on ag.group_id = hags.group_id join sys.dm_hadr_database_replica_states hdrs
on hags.group_id = hdrs.group_id join sys.sysdatabases sd
on hdrs.database_id = sd.dbid
where hdrs.synchronization_state_desc not in('SYNCHRONIZING', 'SYNCHRONIZED')
if @@rowcount > 0
begin
set @xml = cast((select InstName as 'td','', AGName as 'td','', DBName as 'td','', [State] as 'td'
from #output
for xml path('tr'), elements ) as nvarchar(max))
set @body = '<html><body><H3>AAG Status Report</H3>
<table border =1>
<tr>
<th> ServerName </th> <th> Availability Group </th> <th> Database </th> <th> Status </th></tr>'
set @subject = 'Availability Group not Synchronizing: '
set @body = @body + @xml + '</table><body></html>'
EXEC msdb.dbo.sp_send_dbmail
@profile_name = 'Default',
@recipients='DBA@SomeDomain.com',
@subject = @subject,
@body = @body,
@body_format = 'HTML' ;
end
drop table #output 
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