SQL 2012 :: Server Monitoring AlwaysOn / Mirroring Via Zabbix
Feb 4, 2015
We currently use Zabbix to monitor our SQL Servers, generally we use Perf_Counters to gather performance information (CPU Usage, Memory, Blocked process etc.), Zabbix also lets us monitor services as to whether they are up or down. I have searched google looking for any information regarding the monitoring of AlwaysOn/Mirroring within Zabbix and to date ave found nothing. What I am looking to alert on is an indication that Mirroring has stopped/ been interrupted with say something like "Not Synchronized"... Zabbix and monitoring SQL Server 2012 and specifically monitoring AlwaysOn...
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Sep 30, 2014
I'm setting up AG replication over our WAN (1GB MPLS). Using sql stress, AG replication quickly falls behind. Network throughput plateaus at ~14Mbs.
The problem ISN'T NETWORK
using conventional mirroring, the same workload never falls behind, throughput plateaus at ~26Mbs.
it's almost like log stream compression isn't happening for AG...
both mirroring and AG are using async.
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Sep 15, 2014
We are in plan to build a Monitoring tool using PowerShell and Performance Monitor which could monitor 10 to 20 servers. Do you have any reference of any existing tool using Performance Monitor to monitor the SQL Server and available for free? I didn't want to put some effort, if something is available already.
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Oct 29, 2015
I have configured AlwaysOn HA setup with HyperV environments without shared disk and using quorum voting in file share witness.
1. I want to monitor AlwaysOn HA setup and AO Group database on daily basis.
2. To configure email alerts for proactive monitoring if unusual events occur.
Scripts for monitoring in that AO setup as well as AO group database ...
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May 7, 2014
What are the events to be monitored for a Active/Passive Cluster?
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Jun 30, 2015
we have to build high availability SQL 2012 cluster for VDI and we have two options. One option is to build a server cluster with combination of failover and mirroring and other option is to build failover cluster with AlwaysOn.We are not sure which option to chose. We have contacted Microsoft support to provide us some documents and instructions for failovermirroring combination but they have send us instructions for AlwaysOn option.
What would be best way to build high availability cluster for VDI? Also, since first option is very complicated.
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Aug 9, 2015
AlwaysOn open service 'remote registry failed' while validate the cluster.
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Jul 18, 2014
Considering trying to move 2008 acitve/passive cluster with log ship to day old read only 2008 server to 2012 active/passive to 2012 AG Read only server. Only problem is that read only instance may have to be a 2nd instance on a server. The new box is a beast 64 core 256 gig of RAM hp so this is no dog. So I have these choices
migrate 2008 active/passive cluster to 2012 active passive (this will be it's own ordeal)take new monster box and build two instances, one that will run the AG read only database, the other will house reporitng services and analysis services and a few dw databases. We are not heavy into deep dive analysis services yet kind of in it's infancy. Not sure if this other instance will be sql 2008R2 , may be able to do 2012. MY also have a few small sharepoint databases but they barely use it.
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May 14, 2015
Give the Advantages Over SQL SERVER Always on over Clustering....
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Nov 29, 2014
Secondary server is offline due to a hardware issue and the log files are growing on Primary sever for availability databases. The log drive is running out of space. How can I stop the log growth for the primary databases?
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Sep 30, 2015
Is it possible to ONLY allow a login to the availability group listener, but block logins to server instance/nodes?
So: MySQLServerA and MySQLServerB are in an avail group "MyAvailGroup".
I want users to login to MyAvailGroup's listener, but I do NOT want them to login to the actual hosts/nodes directly.
Is that possible?
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Jun 18, 2014
I was told that if I wanted to setup mirroring between multiple instance on the same server that each endpoint had to be different number. Is that true? Or can I use the default 5022 for each instance?
Ex.
Server1Instance1
Use endpoint 5022
Server1Instance2
Use endpoint 5022
VS
Server1Instance1
Use endpoint 5022
Server1Instance2
Use endpoint 5023
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Oct 24, 2015
missing witness server information and the fail-over is broken suddenly? 4:00am no maintenance job. I have one sql job on 10pm for backup on database transaction log only.
I can see the primary have problem then perform fail-over to mirror database, the auto fail-over was broken.
I re-build the sql mirror is OK , but i want to find the root cause.
Windows application event was full when there have many failed event, i have increase log size for application event.
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Oct 22, 2015
I am using sql2012 with partitiondb custom installation over 6 dbs on 4 servers, ~200GB per db. I am looking for the perfect graphic tool (similar to Perfmon+Activity Monitor) where I can monitor a wide-scope SQL environment. I am interested in data / log / table / index growth, buffer cache hit ratio, average wait time, physical/logical reads/writes and such. I am interested in real-time / time-range metrics. I know I can issue immediate queries against dm_os_performance_counters / dm_os_buffer_descriptors / dm_exec_query_stats and get some of the relevant data, but is this the only way?Also, for your opinnion, what are the most crucial metrics to monitor when dealing with multiple dbs?
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Aug 18, 2014
How to find the pending transactions to be applied on secondary in Always On? Can i get those details from dashboard?
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Oct 22, 2014
We are looking to setup an AlwaysOn A/G between two SQL instances across two SQL clusters - one cluster has two nodes the other has three nodes.
Is this possible using WSFC? Does the A/G wizard just handle this?
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Nov 4, 2015
I am developing a process to monitors a table in a high transaction database. The process will count the number of lines in the table to verify if it has changed or it is stuck. Due to the fact that the database has a lot of transaction I don't want to execute a query on database too often.l Is there another suitable way to accomplish this goal ?
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May 13, 2013
I'm setting up my first pair of Sql 2012 servers using AlwaysOn. I set up backups to run on the primary and I understand that you can set up backups to run on both the primary and secondary servers but the secondary will fail. Is there a way I can stop the secondary server from sending out error messages about failed backups? Is it possible to script it so that the server looks at whether it's primary or secondary and turns on or off alerts based on that?
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Mar 13, 2014
I am trying to build the 2 node 2 clusters with the AlwaysOn.
Here isthe landscape.
2 nodes PROD failover cluster (running once instance)
2 nodes DR failover cluster (running 2 instances - DR and PRE-PROD)
Both clusters are in different geographies.
PRE-PROD can be editable. So out of scope of Always On.
One instance on PROD -> DR of the other box. [Want to achive thru AlwaysON]
Now my Question:
1) Do i need to have all the 4 nodes in same failover cluster group? If yes, then this would become MultiSubnet cluster Or Is there any way those 2 diffrerent failover clusters (one DR and one PROD) can be part of AlwaysOn.
2) Can i use the clustered disks as in the above landscape for always on?
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Apr 11, 2014
We have 2 SQL 2012 servers. Our application has 2 databases. We are creating an AlwaysOn cluster. Is it good to create 2 AlwaysOn clusters to have 1 database primary on one of the servers and the other database primary on the other server?
I have been asked if it is possible to have one database running on one server and the other database on the other server. Is this possible without creating 2 separate AlwaysOn clusters?
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Apr 14, 2014
While configuring SQL Server 2012 Cluster with Always on, why do we need two secondary replicas.
The attached link will describe the actual query. [URL] ....
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Apr 28, 2014
I have an A & B node set up and running. I now want to add a C NODE.
The catch is the C NODE is in a SQL Cluster Environment.
I am guessing I add the Virtual Name of the C node to the current Always ON Cluster?
I tried adding it...the error message says" the Virtual Node is really the A node and to add the A NODE"?
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Apr 24, 2015
What are differences between always on and SQL Server Clustering
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Jan 23, 2013
We have 4 Servers which have SQL SERVER 2012 and "AlwaysOn" have been enabled on all 4 servers:
Server1,Server2,Server3,Server4
Server1 is the Primary node and thr rest are secondaries. There is a Sync relation between Server1 and Server2 and also there is aSync relation between Server1 and Server3 & Server4.
Is it possible to setup log shipping from Server2 & Server3(secondaries) to two new servers?
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Feb 13, 2014
I have four instances and each instance have its own Availability Group with its own listener.
Would like to know if you can have one listener for multiple Availability groups?
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Mar 17, 2014
How many nodes can you have in a cluster with SQL 2012 alwaysOn.
I understand that availability groups are limited to 5 nodes but if you had a 10 node cluster and decided to create multiple availability groups using various nodes within the 10 nodes but never exceeding 5, is that possible?
Or is there a counter or some validation from SQL AlwaysOn that actually hard limits to a grand total of 5 nodes in a cluster?
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Apr 28, 2014
We had 3 Availability Groups set up in SQL 2012 last year but they were poorly named so I am just looking to rename them but there doesn't seem to be any command for it that I can find.Can they not be renamed once created? I guess I could just create new ones and move the DB's into them but just thought I would check!
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Aug 21, 2014
In always on under availability group server name properties can see the option Readable Secondary. In that for secondary server the Readable Secondary Option is YES and for Primary it is Read-Intent. I believe Read-Intent allows only read only connections and YES allows all user connections.
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Aug 21, 2014
In always on under availability group server name properties can see the option Readable Secondary. In that for secondary server the Readable Secondary Option is YES and for Primary it is Read-Intent. I believe Read-Intent allows only read only connections and YES allows all user connections.
What exactly it means for the primary and secondary?
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Nov 13, 2014
Can we make SQL 2012 Always ON over the normal SQL Cluster 2012.
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Dec 10, 2014
I have setup SQL AlwaysOn between primary and DR data centers. Here is the setup:
Primary data center: Server1 (Primary), Server2 (Sync Commit Secondary), Server3 (ASync Commit Secondary)
DR data center: Server4 (ASync Commit Secondary)
Data synchronization and manual failover works fine. But, sometimes, the AlwaysOn cluster automatically fails over to Sync Commit Secondary on Primary data center. Here is the error message from Failover Cluster Manager->Cluster Events:
"Cluster has missed two consecutive heartbeats for the local endpoint xx.xx.xx.yy:~3343~ connected to remote endpoint xx.xx.xx.zz:~3343~"
"Cluster has lost the UDP connection from local endpoint xx.xx.xx.yy:~3343~ connected to remote endpoint xx.xx.xx.zz:~3343~"
I had our network engineer check all connections multiple times and he confirmed everything is fine. But he was also able to confirm (using monitoring tools) that right at the time of a failover, there is almost 2GB worth of traffic going from Primary Server to DR server. That happens every time. I had checked the times of all failovers and there is no job or process occuring that will produce 2GB worth of data. Also, this happens regardless of which server is primary.
Even though the failover works fine, this unexpected automatic failover due to missed heartbeats are occurring often (2-3 times a month).
Here is the list of errors from the Cluster Validation Report:
Under Network Section, I see the following error messages in Red:
Validate Network Communication
Network interfaces Server4 (DR) - SAN_Team and Server1 (Primary) - SAN_Team - VLAN 20 are on the same cluster network, yet address xx.xx.xx.pp is not reachable from xx.xx.xx.yy using UDP on port 3343.
Network interfaces Server4 (DR) - SAN_Team and Server2 (Secondary) - SAN_Team - VLAN 20 are on the same cluster network, yet address xx.xx.xx.qq is not reachable from xx.xx.xx.yy using UDP on port 3343.
[Code] ....
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Jan 27, 2015
So I have 2 servers S1 & S2.
Database Group 1 = L1 with Primary S1 and Secondary S2
Database Group 2 = L2 with Primary S2 and Secondary S1
For 99% of the time the 2 groups of databases are not related. For the 1 procedure that does move data from L1 to L2 something like
Update L2.DB.Owner.Table
set flag = 1
Whare a = 0
On S1 I have a linkedServer with connection to L2.
If I have a failover I cannot have L2 on S2 as they are essentially the same server.
How to I use the 2 groups hand in hand.
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Mar 1, 2015
In always on docs in msdn they mention only about backup of secondary.. explain the backup of primary or how logs are managed in primary database. My doubt is a normal database in full recovery mode the log file will grow if we didnt take proper log backup,how the same is managed in primary in Always On.
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