I took over a project that uses SymmetricDs to sync tables between a target and a source. The tables from the source aren't syncing to the target at the moment.
I have searched online but found no help.
I have checked the sym_outgoing_batch and sym_incoming_batch tables but can't figure out the use of the information there.
I also queried the sync_trigger table. I have the result of the query as a link below.
If you have an idea on where I could look, please let me know. I can run queries and give you the result.sync_trigger result
Uncomment these lines "--where status != 'OK'" to see if anything is NOT in OK state if there is that is causing the SYNC to STOP
-- SQL QUERY
-- Symmetric DS : MONITOR : HEARTBEAT / INCOMING / OUTGOING / MONITOREVENTS
SELECT node_id, host_name, getdate() as dtNOW ,heartbeat_time FROM [tablename].[dbo].[sd_node_host] with (NOLOCK) where heartbeat_time > '2022-01-01'
--SELECT * FROM [tablename].[dbo].[sd_context] with (NOLOCK)
SELECT * FROM [tablename].[dbo].[sd_outgoing_batch] with (NOLOCK)
--where status != 'OK'
order by create_time desc
SELECT * FROM [tablename].[dbo].[sd_incoming_batch] with (NOLOCK)
--where status != 'OK'
order by create_time desc
-- Symmetric DS : MONITOR
SELECT * FROM [tablename].[dbo].[sd_monitor_event] with (NOLOCK) WHERE is_resolved != 1
SELECT * FROM [tablename].[dbo].[sd_monitor_event] with (NOLOCK)
EDIT
here is the link for the symmetricds user guide.
https://www.symmetricds.org/doc/3.13/html/user-guide.html#_outgoing_batch
basically NE means it is ready for replication. Did you ever have it set up or is this a new setup that you are trying to get started?
EDIT 2 ENGINE CONFIGS
MAIN
engine.name=<SDS_MAIN>
db.driver=net.sourceforge.jtds.jdbc.Driver
db.url=jdbc:jtds:sqlserver://<IP>:1433/<DB>;useCursors=true;bufferMaxMemory=10240;lobBuffer=5242880
db.user=***********
db.password=***********
registration.url=
sync.url=ttp://<IP>:<PORT>/sync/<SDS_MAIN>
group.id=<GID>
external.id=000
auto.registration=true
initial.load.create.first=true
sync.table.prefix=sym
#start.initial.load.extract.job=false
compression.level=-1
compression.strategy=0
CHILD
engine.name=<SDS_CHILD>
db.driver=net.sourceforge.jtds.jdbc.Driver
db.url=jdbc:jtds:sqlserver://<IP>:1433/<DB>;useCursors=true;bufferMaxMemory=10240;lobBuffer=5242880
db.user=***********
db.password=***********
registration.url=http://<IP>:<PORT>/sync/<SDS_MAIN>
sync.url=http://<IP>:<PORT>/sync/<SDS_CHILD>
group.id=<GID>
external.id=100
auto.registration=true
initial.load.create.first=true
sync.table.prefix=sym
start.initial.load.extract.job=false
compression.level=-1
compression.strategy=0
Related
I used below metioned query to find out if any failover happened in the last 30 minutes
create table #errormsg(duration datetime,errornum int,dbmessage varchar(max))
DECLARE #tags3 VARCHAR(5000)SET #tags3 = (SELECT CAST( t.target_data AS XML ).value('(EventFileTarget/File/#name)[1]', 'VARCHAR(MAX)') FROM sys.dm_xe_sessions s INNER JOIN sys.dm_xe_session_targets t ON s.address = t.event_session_address WHERE t.target_name = 'event_file' and s.name='AlwaysOn_health');
IF #tags3 is Not NULL begin WITH cte_HADR AS (SELECT object_name, CONVERT(XML, event_data) AS data FROM sys.fn_xe_file_target_read_file(#tags3, null, null, null)WHERE object_name = 'error_reported')
insert into #errormsg SELECT data.value('(/event/#timestamp)[1]','datetime')AS [timestamp],data.value('(/event/data[#name=''error_number''])[1]','int') AS [error_number],data.value('(/event/data[#name=''message''])[1]','varchar(max)') AS [message] FROM cte_HADR WHERE data.value('(/event/data[#name=''error_number''])[1]','int') = 1480 select distinct GETDATE() as currenttime, er.duration,dbs.name from #errormsg er inner join sys.databases dbs on er.dbmessage LIKE '%"' +dbs.name+'"%' where er.duration>=(DATEADD(mi,-30,GETDATE()) );
drop table #errormsg;end
else IF OBJECT_ID(N'TempDB.dbo.#errormsg', N'U') IS NOT NULL drop table #errormsg;
But I did not get the result I was expecting because of the "Incorrect Timestamp on Events in Extended Events".
In SSMS -->Management-->Extended Events-->Sessions-->AlwaysOn_health--> click event file.
In that event file,
I checked recently role changed time for 'availablity_replica_state_change'.
In MSSQL log folder--> availablity_replica_state_change time in "AlwaysOn_health" file
timestamp in (1) and (2) needs to be same.
But for me its shows different time. So I didn't get the proper result.
Instead of using extended events, Is there any query to read the MS SQL error logs?
Is there any query to find out if any failover happened in the last 30 minutes?
Please help me to find a solution for this .
There is always a need to find out details, either intentionally Or mistakenly someone executed DROP/DELETE command on any of following SQL Server database objects.
DROPPED - Table from your database
DROPPED - Stored Procedure from your database
DELETED - Rows from your database table
Q. Is there TSQL available to find db user who performed DELETE/DROP?
Q. What kind of permissions are needed for user to find out these details?
Did you check this ?
Right click on database.
Go to as shown in image :
Solution 2 :
This query gives alot of useful information for a database(apply filter as required) :
DECLARE #filename VARCHAR(255)
SELECT #FileName = SUBSTRING(path, 0, LEN(path)-CHARINDEX('\', REVERSE(path))+1) + '\Log.trc'
FROM sys.traces
WHERE is_default = 1;
SELECT gt.HostName,
gt.ApplicationName,
gt.NTUserName,
gt.NTDomainName,
gt.LoginName,
--gt.SPID,
-- gt.EventClass,
te.Name AS EventName,
--gt.EventSubClass,
-- gt.TEXTData,
gt.StartTime,
gt.EndTime,
gt.ObjectName,
gt.DatabaseName,
gt.FileName,
gt.IsSystem
FROM [fn_trace_gettable](#filename, DEFAULT) gt
JOIN sys.trace_events te ON gt.EventClass = te.trace_event_id
WHERE EventClass in (164) --AND gt.EventSubClass = 2
ORDER BY StartTime DESC;
Hey guys the code below is taking a really long time. I've been looking at it for quite a while. Is there anything that stands out as the obvious cause of delay?
[SQLSRV-3-JB] is a linked server BTW
Select count(cast (Unique_ID as bigint)) as [Count],
T.[Region_Code],
T.[Region_Name],
U.[Region_Code],
Y.[Examination_Year],
case when [Subject] = 'MUSIC THEORY' THEN 'Theory'
else 'Practical'
end
from [SQLSRV-3-JB].[X].[dbo].[Exam_and_Candidate_Details] Y
left join [SQLSRV-3-JB].[X].[dbo].[UK_Exam_Centre_Info] T
on Y.Centre_Code = T.Centre_Code
left join [SQLSRV-3-JB].[X].[dbo].[UK_Exam_Centres] U
on Y.Centre_Code = U.Centre_Code
where Y.[Examination_Year] between 2010 and 2016
group by Y.[Examination_Year],
T.[Region_Code],
T.[Region_Name],
U.[Region_Code],
case when [Subject] = 'MUSIC THEORY' THEN 'Theory'
else 'Practical'
end
Yes, there is one very obvious problem - the remote server. When you use a linked server like this, SQL Server has a disturbing habit of pulling all of the data in the remote tables to the local server before performing JOINs or filtration.
The correct way to handle this is to make this query a view on the remote server, and query the view with your WHERE clause on your end. So, your remote code would look like this:
-- Remote Server
USE X
GO
CREATE VIEW dbo.ExamCenterInfo
AS
Select count(cast (Unique_ID as bigint)) as [Count],
T.[Region_Code],
T.[Region_Name],
U.[Region_Code],
Y.[Examination_Year],
case when [Subject] = 'MUSIC THEORY' THEN 'Theory'
else 'Practical'
end
from dbo.[Exam_and_Candidate_Details] Y
left join dbo.[UK_Exam_Centre_Info] T
on Y.Centre_Code = T.Centre_Code
left join dbo.[UK_Exam_Centres] U
on Y.Centre_Code = U.Centre_Code
group by Y.[Examination_Year],
T.[Region_Code],
T.[Region_Name],
U.[Region_Code],
case when [Subject] = 'MUSIC THEORY' THEN 'Theory'
else 'Practical'
end
Then your local code:
-- Local Server
SELECT *
FROM [SQLSRV-3-JB].[X].[dbo].ExamCenterInfo ECI
where ECI.[Examination_Year] between 2010 and 2016
NOTE: There is some possibility that this will pull all of the view output before filtering by year. If this is still a problem, you will have to create a more complex mechanism to execute the view with filtration on the remote server.
We're running a web app (2 instances) on Azure, backed by a SQL Azure database. At any given time there are 50-150 users using the website. The database runs at S2 performance level. The DTU is around 20% on average.
However, a few times every day I suddenly get hundreds of errors in my logs with timeouts, like this:
An error occurred while executing the command definition. See the inner exception for details.
The wait operation timed out.
Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding. This failure occurred while attempting to connect to the routing destination. The duration spent while attempting to connect to the original server was - [Pre-Login] initialization=1; handshake=21; [Login] initialization=0; authentication=0; [Post-Login] complete=1;
We're using EF6 for queries with the default command timeout. I've configured this execution strategy:
SetExecutionStrategy("System.Data.SqlClient",
() => new SqlAzureExecutionStrategy(10, TimeSpan.FromSeconds(15)));
The database (about 15GB total) is heavily indexed. These errors occur all over the place, usually dozens to hundreds within 1-2 minutes.
What steps can I take to prevent this from happening?
The fact that it happens in 1-2 minutes might mean a burst in activity or some process that might be locking up tables.
If your DTU during those times is at 20% is not a CPU issue, but you can always find which are the bottlenecks by running this query on the DB:
SELECT TOP 10
total_worker_time/execution_count AS Avg_CPU_Time
,execution_count
,total_elapsed_time/execution_count as AVG_Run_Time
,(SELECT
SUBSTRING(text,statement_start_offset/2,(CASE
WHEN statement_end_offset = -1 THEN LEN(CONVERT(nvarchar(max), text)) * 2
ELSE statement_end_offset
END -statement_start_offset)/2
) FROM sys.dm_exec_sql_text(sql_handle)
) AS query_text
FROM sys.dm_exec_query_stats
ORDER BY Avg_CPU_Time DESC
Even if the DB is heavily indexed, indexes get fragmented, I'd advice running this to check the current fragmentation:
select a.*,b.AverageFragmentation from
( SELECT tbl.name AS [Table_Name], tbl.object_id, i.name AS [Name], i.index_id, CAST(CASE i.index_id WHEN 1 THEN 1 ELSE 0 END AS bit) AS [IsClustered],
CAST(case when i.type=3 then 1 else 0 end AS bit) AS [IsXmlIndex], CAST(case when i.type=4 then 1 else 0 end AS bit) AS [IsSpatialIndex]
FROM
sys.tables AS tbl
INNER JOIN sys.indexes AS i ON (i.index_id > 0 and i.is_hypothetical = 0) AND (i.object_id=tbl.object_id))a
inner join
( SELECT tbl.object_id, i.index_id, fi.avg_fragmentation_in_percent AS [AverageFragmentation]
FROM
sys.tables AS tbl
INNER JOIN sys.indexes AS i ON (i.index_id > 0 and i.is_hypothetical = 0) AND (i.object_id=tbl.object_id)
INNER JOIN sys.dm_db_index_physical_stats(DB_ID(), NULL, NULL, NULL, 'LIMITED') AS fi ON fi.object_id=CAST(i.object_id AS int) AND fi.index_id=CAST(i.index_id AS int)
)b
on a.object_id=b.object_id and a.index_id=b.index_id
order by AverageFragmentation desc
You can also use Azure Automation to schedule an automatic rebuilding of fragmented indexes, see answer at: Why my Azure SQL Database indexes are still fragmented?
This is running on SQL Server 2000
Background: when a new server is brought onto the network, it will pass through a series of status (stages) such as (loading, testing, configuring, production, etc) were production is the final step (not every server in the report will be in production so this bit of information may be a moot point).
I inherited this so if there are any questions, I'll answer them as best as I can. I'm trying to run a query to get the latest status of all the servers during a specific time frame. My query is currently returning every status for the server and I only need the current status and that is where I need your help.
The query I'm working with is as follows:
SELECT SD.ProjectName, SD.SystemName, SD.Status, H.history_id
FROM dbo.SI_SystemDetail AS SD
INNER JOIN dbo.SI_Projects AS P ON SD.ProjectName = P.ProjectName
INNER JOIN dbo.SI_StatusHistory AS H ON SD.SystemName = H.SystemName
WHERE
(P.Cancelled = 'N')
AND (P.Platform LIKE '%ibm%')
AND ('20110101' <= CONVERT(varchar(8), H.EffectiveDate, 112))
AND (CONVERT(varchar(8), H.EffectiveDate, 112) <= '20111111')
ORDER BY
H.history_id DESC, SD.SystemName, SD.ContactSBCuid, SD.ActualLiveDAte DESC,
SD.ProjectName, SD.SystemType, H.EffectiveDate`
This will return several duplicates for systemname but I only need one and that should correspond with the highest history_id number. For example, lets say there is a server named:
Server Name Status History_ID
Server01 Loading 1001
Server01 Configuring 1081
Server01 Testing 1101
Server01 Production 1451
Server02 Loading 1002
Server02 Configuring 1083
Server02 Testing 1104
Server02 Failed 1455
I would just need the following results returned:
Server Name Status History_ID
Server01 Production 1451
Server02 Failed 1455
Thanks in advance for the assistance.
UNTESTED:
SELECT SD.ProjectName, SD.SystemName, SD.Status, H.history_id
FROM dbo.SI_SystemDetail AS SD
INNER JOIN dbo.SI_Projects AS P
ON SD.ProjectName = P.ProjectName
INNER JOIN dbo.SI_StatusHistory AS H
ON SD.SystemName = H.SystemName
WHERE (P.Cancelled = 'N') AND (P.Platform LIKE '%ibm%') AND ('20110101' <= CONVERT(varchar(8), H.EffectiveDate, 112)) AND (CONVERT(varchar(8), H.EffectiveDate, 112) <= '20111111')
AND history_ID = (
Select max(history_ID)
FROM SI_Status_History iSH
where iSH.SystemName = SD.SystemName)
ORDER BY H.history_id DESC, SD.SystemName, SD.ContactSBCuid, SD.ActualLiveDAte DESC, SD.ProjectName, SD.SystemType, H.EffectiveDate