Questions tagged [troubleshooting]
The troubleshooting tag has no usage guidance.
51
questions
0
votes
1answer
1k views
Periodically very slow execution of simplest queries
Inspecting MySQL slow query log I found out that in certain periods of time there are a bunch of queries in log which are supposed to be very fast but were actually very slow.
For example:
# User@...
11
votes
6answers
63k views
How to fix a messed up replication on MS SQL Server
I restored a database from a backup. The database uses replication to publish to a different server. Assuming the database restore would break the replication, I tried to delete the replication and re-...
1
vote
3answers
3k views
Rows deleted in the subscriber - what to do? - SQL Server Transactional Replication
Someone has delete by mistake a row of a table in the subscribed server/database.
I am getting the following error message:
The row was not found at the Subscriber when applying the replicated
(...
2
votes
1answer
1k views
Cleaning up orphaned metadata in information_schema
OK - so the server (Percona 5.6 in this case) 'went away' in the middle of declaring a constraint like so:
alter table mytable
add constraint fk_mytable_myothertable
foreign key (myothertable_id)
...
0
votes
1answer
227 views
PostgreSQL CPU 100% after configure Wal log shipping hot standby
I have configured Hight Avaliabily WAL Log Shipping Hot Standby (SSL) with one node. But after I configure, both hosts (primary and secondary) take 100% CPU usage.
The most strange is because I have ...
0
votes
1answer
27 views
Case overcounting what is expected
So I am attempting to setup a query that can track actions that are automated within our web system.
The first thing I am attempting to check is the reminders we are sending out to customers.
I have ...
7
votes
4answers
535 views
How to troubleshoot orm queries interfering with other applications
Well, it's hypothetical scenario but what I'm trying to understand is the path to go from a post-morten log (say, an SQL Server Profiler trace) to identify the code on a ORM situation. To make it not ...
0
votes
1answer
218 views
dbmail failing to send intermittently [duplicate]
We have a SQL Agent job that runs daily that sends emais out to our drivers with their schedules for the next day.
For 85% of drivers, the emails are not getting out of the SQL server. The other 15% ...
Marcello Miorelli
13.9k38 gold badges117 silver badges237 bronze badges
1
vote
1answer
3k views
Activity Monitor paused
Some of our end-users still like to use the Activity Monitor in SQL Server.
When setting up our SQL-server 2016 servers the activity monitor always ends up in a paused state when the users are not ...
0
votes
1answer
88 views
The service broker is administratively disabled
I have just restored some databases what use service broker from LIVE to staging.
it is not working and when I put a profile trace to run it only shows messages related to database id 1 and 4, ...
0
votes
2answers
360 views
PostgreSQL slow query log entries contain no query details, only duration
I have a PostgreSQL RDS instance hosted in AWS. I have set the log_min_duration_statement setting to 1 second. When checking my log for slow queries I found the following six entries which don't ...
-1
votes
1answer
47 views
Can a query that executes quickly still be a poorly written query? [closed]
This is more of a theoretical question and here is some background. Our system uses MySQL and was experiencing some slowdowns late in the day. Running SHOW FULL PROCESSLIST showed me around 10 rows ...
2
votes
1answer
218 views
Some timeout in query store but get all SP:Starting and SP:Completed in profiler
I have a report SP running. The user complaint report timeout sometimes. And I do get some canceled execution plan in my query store.
But in my profiler tracing file, every SP:Starting has its SP:...
12
votes
2answers
663 views
What is hot spotting in the context of adding files to tempdb?
I'm trying to find out whether it is possible to add tempdb files to a SQL Server without having to restart the SQL Server service. I saw this answer here on Database Administrators:
Tempdb Add files ...
2
votes
3answers
567 views
SQL Server 2005 merge replication failure
We have a customer who, when trying to sync a client (subscriber) to the server (publisher,) receives the following error:
2012-11-30 21:03:33.334 Percent Complete: 18
2012-11-30 21:03:33.334 Data ...
Marcello Miorelli
13.9k38 gold badges117 silver badges237 bronze badges
4
votes
1answer
2k views
Increase memory limit when server is stopped
There was a local SQL Server 2012 instance. Once memory has decreased to critical 128 MB and then has stopped by me.
I can not start it (idea: not enough memory).
Is it possible to increase this ...
3
votes
1answer
159 views
Troubleshooting a slow performing encrypted stored procedure
I have a stored procedure which is part of a vendor supplied system. The stored procedure is encrypted so we can't see the code.
The stored procedure has all of a sudden started to run slow.
The ...
3
votes
2answers
596 views
Max worker thread exceeded after manual AG failover
We have two SQL Server 2016 SP2 CU6 Enterprise running on physical hardware (32 cores) with one AG that contains 5 db's. The secondary is not readable. Today we did a planned manual failover, so we ...
Sean Gallardy - Retired User
20.8k2 gold badges34 silver badges64 bronze badges
1
vote
1answer
52 views
MySQL Server :: My C Code can remotely create a database, but not “INSERT INTO” it
I’ve written a C program which does the following when it starts:
Connects to a remote Linux MySQL server over the network
Creates a new, uniquely-named database
Sends a “USE _____” command to ...
2
votes
1answer
1k views
Replicaton - The current transaction cannot be committed and cannot be rolled back to a savepoint
After creating a replication publication, I go ahead and create a subscription using the script below:
-----------------BEGIN: Script to be run at Publisher 'MY_PUBLISHER_SERVER'--------------
use [...
Marcello Miorelli
13.9k38 gold badges117 silver badges237 bronze badges
1
vote
2answers
196 views
is it possible to trim the table output for a specific job?
I have a routine to save the logins and apply them on a different server , and I run this routine from a job that I have scheduled to run everyday.
On that job I have specified these 3 things:
Log ...
Marcello Miorelli
13.9k38 gold badges117 silver badges237 bronze badges
1
vote
0answers
1k views
service broker - poison message - how to handle? how to enable poison messase handling?
I am getting constantly this error message on service broker:
POISON MSSAGE - Message Removed from the queue to allow other messages
to proceed - ApplicationID: 377411
select top 1000
* from ...
Marcello Miorelli
13.9k38 gold badges117 silver badges237 bronze badges
4
votes
1answer
747 views
sp_WhoIsActive vs sp_BlitzFirst @ExpertMode = 1
I use sp_WhoIsActive and sp_BlitzFirst (with ExpertMode paramter set to 1) to get an overview of what is happening on the SQL Server in real time. I find these to be an upgrade on sp_who, sp_who2 etc.....
4
votes
1answer
2k views
SQL SERVER FileTable/FILESTREAM share suddenly becomes unavailable
We had difficulty setting up a FileTable share on a SQL 2014 instance and after giving up on trying to name it after our instance name, we left the name of the share as mssqlserver, but it finally ...
0
votes
1answer
1k views
length of the result exceeds the > length limit (2GB) of the target large type
Getting the following error message on the Sql Server Error Log:
SQLServer Error: 599, WRITE: The length of the result exceeds the
length limit (2GB) of the target large type. [SQLSTATE 42000]
(...
0
votes
2answers
4k views
Imposssible to expand a database in SQL Server Management Studio
I am experiecing a strange problem. I have a SQL Server 20008 R2 instance that recently (after years of running smoothly) started to become slow.
One symptom that I notice is that when working from ...
2
votes
1answer
244 views
SQLServerAgent Error: 32
A job that "will Recycle SQL Server Agent Error Logs once every week on Sunday at 12:00:00 AM." has been failing this weekend on SQL Server 2008 R2 SP2 Enterprise.
This job executes a system stored ...
15
votes
4answers
64k views
how to query SSISDB to find out the errors in the packages?
I have seen this question
SSIS 2012 - How to Query Currently Running Packages in T-SQL?
It gives me the following script:
SELECT
E.execution_id
, E.folder_name
, E.project_name
, E....
11
votes
4answers
41k views
Find all IP's or users who access a specific SQL Server
Let's say I found a SQL Server and I have no idea which applications connect to it. Maybe I find one application but I am not sure if it is the only one using it.
Is there a nice way of finding all ...
1
vote
1answer
622 views
How can I trace the root cause of a MySQL database table that crashed?
Are there any standard practices or methods for tracing the cause of a MySQL table crash?
If I repair a table that had crashed, how do I determine what caused it to crash in the first place?
Storage ...
2
votes
1answer
9k views
Clients timing out with no apparent reason
I have a SQL Server 2005 server that's been running fine most of the time.
Today the users started to get time outs when opening new connections, including myself when I tried to open another tab on ...
5
votes
4answers
10k views
“SSIS Evaluation Period Has Expired” on Dev Instance?
I recently started receiving the following error on a dev server. At one point SQL Server 2016 CTP was installed here but we've upgraded since then. I've tried uninstalling / reinstalling SSIS as well ...
23
votes
2answers
23k views
What can cause a mirroring session to timeout then failover?
We have two production SQL Servers running SQL Server 2005 SP4 with cumulative update 3. Both servers run on physical machines that are identical. DELL PowerEdge R815 with 4 x 12 core CPUs and 512GB (...
1
vote
1answer
730 views
Why my transaction has not been replicated? What was the transaction sequence number?
I have been troubleshooting a replication problem, according to the picture below:
with reference to the picture above,
the bit that says
Sessions of the distribution agent
I can get using the ...
1
vote
1answer
2k views
How to run SQL Profiler to monitor 1 specific stored procedure? [duplicate]
I have an issue where a stored procedure will run properly when executed from SQL Management Studio, but when the stored procedure is called from an application, it doesn't return the results to the ...
3
votes
4answers
311 views
SQL Server unusual behavior on LOB insertion
We are facing unusual behavior on a SQL Server 2008 R2 instance. We have a small .NET application, which we use to insert images and pdf files inside database as VARBINARY. Sometimes, we are facing ...
16
votes
3answers
35k views
Sleeping SPID blocking other transactions
I'm really having trouble tracking down some blocking we are experiencing.
The root blocking SPID's status is 'sleeping', the cmd is 'AWAITING COMMAND', and the sqltext is SET TRANSACTION ISOLATION ...
1
vote
1answer
2k views
Informix Server Rejected Connection
What are possible causes for the following error?
DB Error: connect failed [nativecode=08004 [unixODBC][Informix]
[Informix ODBC Driver [Informix]Server rejected the connection.]
I have doubled ...
2
votes
1answer
928 views
SQL Server uses too much CPU
I have a VM 2012 R2 server with SQL Server 2014 Express SP2 installed. There are some applications and databases, but nothing too big. Databases are small, about 100MB size combined.
At some moment (...
0
votes
1answer
424 views
Visual Studio 2010 Shell Error - is it Causing this SQL Server error?
Visual Studio 2010 Isolated Shell has the infamous "Invalid License Data. Reinstall" error. I have SSMS 2014. I have tried reinstalling several times, I installed Visual Studio 2013 but SSMS doesn't ...
2
votes
0answers
125 views
Why is my server with memory pressure when I have 4.3GB available memory? [duplicate]
I'm doing a couple of tests in my local computer and I noticed that the plan cache was being wiped every couple of minutes.
After researching a bit I noticed on my error log that my instance was with ...
1
vote
0answers
1k views
How to identify file for “The system cannot find the file specified.” during a pg_ctl -D start?
I'm getting one message during pg_ctl -D start of the standby server. Perhaps more of a general troubleshooting question.
This is what I'm seeing when I do a pg_ctl -D start:
D:\>pg_ctl -D d:\...
6
votes
1answer
3k views
How to Start Express SQL Server instance in Single user mode?
I want to start my SQL Server Express instance in single user mode to do some troubleshooting such as restoring the Master database.
I am unable to find the "Startup Parameter" options in SQL Server ...
1
vote
1answer
124 views
MySQL Performances Issues
I'm in debate with my database admin. He claims that my queries I'm sending through PHP are the problem and he is stating several things I believe are completely false.
To begin I have a site ...
0
votes
2answers
678 views
Signal wait always high
I'm not sure if this is the right place to ask this question, so apologies in advance if not.
Problem I'm facing is: One of my server's signal wait floats at around %35 and won't go down.
Top 3 ...
0
votes
1answer
598 views
MonetDB ODBC driver memory allocation error on Windows
The driver is the latest from a month ago: 2014-SP2: 11.17.17, 64-bit.
Windows is Server 2012.
I have limited options to test whether earlier versions of the driver would work or this version works ...
0
votes
1answer
514 views
MySQL: How to clean MySQL from RHEL5?
I have installed MySQL 5.1.73 community edition through RPM. It was working fine.
I uninstalled this version by using yum remove mysql-server command.
I wanted to upgrade MySQL from 5.1.73 to 5.6.19 ...
2
votes
2answers
3k views
How to configure data collection in SQL Server 2012?
In SSMS of SQL Server 2012 Enterprise on Windows Server R2 Standard, each time I am trying to set sub-option "On demand" of option "Non-cached - Collect and upload data on the same schedule" of Data ...
4
votes
1answer
2k views
How can a connection for one DB block a connection to another DB in SQL Server?
We have an interesting scenario. For weeks, we have been experiencing 'outages' on SQL Server 2008 -- where our websites have slowed to a crawl and mass timeouts for all customers who have DB's ...
6
votes
1answer
514 views
Troubleshooting Postgresql spatial query failure. Next steps?
We have a set of spatial queries that are failing and I'm struggling with troubleshooting them. I suspect that we're running into some bug, but I'd like to nail things down a bit better so as to be ...
