I am using Jmeter 5 to run a simple SQL UPDTAE statement using JDBC Request sampler. After running the query ([Screenshot: JDBC Request][2])I can see in the result tree window it says "1 updates" ([Screenshot: View Result Tree][1]), but when I check within the database I dont see the specific field is getting updated.
It doesn't seem to be a connection issue. When I run the same query from Management Studio the field is getting updated fine. Am I missing some settings in Jmeter?
You need to set true in Auto Commit of JDBC Connection Configuration
Turn auto commit on or off for the connections.
Related
I am currently working on load testing an application, where the users can create orders. Once the order is created, the request reaches the Middleware which triggers a scheduler. From the scheduler, the GET Status reaches a 3rd Party API and the Response is stored at the Backend (DB). The GET Status response can only be seen on the Backend and it will not be visible to the User Interface. Please help on How to record this GET Status Response at the Backend using latest version of Jmeter.
You can use JDBC Request sampler for reading information from the database
Download JDBC Driver for the database you're using and drop it to JMeter Classpath
Restart JMeter to pick up the driver
Add JDBC Connection Configuration element and specify database URL, credentials and thread pool name
In the JDBC Request sampler set the same thread pool name as in the point 3 and create an SQL Select query to fetch the response from the database. If you will need the response later on it can be stored into a JMeter Variable
For one of the test plan, I have 1000's of records. It would be helpful to have bulk update. Has anyone implemented it or know of how to implement it in Jmeter. Also, can prepared update statement be used to achieve it?
You just need to follow the given below steps to create a JDBC test plan.
1) Firstly, Download the JDBC Driver for SQL Server from Microsoft site.
2) Once the JDBC Driver is downloaded extract to find the .jar file of driver.
3) Now, open the Jmeter and create a test plan.
4) Select the test plan node and there is a section "Add directory or jar to classpath", browse the extracted JDBC Driver and select it.
5) Create a thread group and add config element "JDBC Connection Configuration" and configure according to your requirement.
6) Make sure to provide the variable name.
7) Now, Add a JDBC Request from the samplers in thread group section and use the same variable as you mentioned in the "JDBC Connection Configuration".
8) Select the query type as "Update Statement" from the drop down.
9) Mention your query in the editor panel.
10) Finally, add the listener to trace the output of your test plan and execute the test.
Hope this will entertain your question.
I use datagrip to move some data from a mysql installation to another postresql-database.
That worked for 3 other tables like a charm. The next one, over 500.000 rows big, could not be imported.
I use the function "Copy Table To... (F5)".
This is the log.
16:28 Connected
16:30 user#localhost: tmp_post imported to forum_post: 1999 rows (1m
58s 206ms)
16:30 Can't save current transaction state. Check connection and
database settings and try again.
For other errors like wrong data types, null data on not null columns, a very helpful log is created. But not now.
The problem is also relevant when using the database plugin for IntelliJ-based IDEs, not only DataGrip
The simplest way to solve the issue is just to add "prepareThreshold=0" to your connection string as in this answer:
jdbc:postgresql://ip:port/db_name?prepareThreshold=0
Or, for example, if you a using several settings in the connection string:
jdbc:postgresql://hostmaster.com:6432,hostsecond.com:6432/dbName?&targetServerType=master&prepareThreshold=0
It's a well-known problem when connecting to the PostgreSQL server via PgBouncer rather than a problem with IntelliJ itself. When loading massive data to the database IntelliJ splits data into chunks and loads them sequentially, each time executing the query and committing the data. By default, PostgreSQL starts using server-side prepared statements after 5 execution of a query.
The driver uses server side prepared statements by default when
PreparedStatement API is used. In order to get to server-side prepare,
you need to execute the query 5 times (that can be configured via
prepareThreshold connection property). An internal counter keeps track
of how many times the statement has been executed and when it reaches
the threshold it will start to use server side prepared statements.
Probably your PgBouncer runs with transaction pooling and the latest version of PbBouncer doesn't support prepared statements with transaction pooling.
How to use prepared statements with transaction pooling?
To make prepared statements work in this mode would need PgBouncer to
keep track of them internally, which it does not do. So the only way
to keep using PgBouncer in this mode is to disable prepared statements
in the client
You can verify that the issue is indeed because of the incorrect use of prepared statements with the pgbouncer via viewing IntelliJ log files. For that go to Help -> Show Log in Explorer, and search for "org.postgresql.util.PSQLException: ERROR: prepared statement" exception.
2022-04-08 12:32:56,484 [693272684] WARN - j.database.dbimport.ImportHead - ERROR: prepared statement "S_3649" does not exist
java.sql.SQLException: ERROR: prepared statement "S_3649" does not exist
at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2440)
at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:2183)
at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:308)
at org.postgresql.jdbc.PgConnection.executeTransactionCommand(PgConnection.java:755)
at org.postgresql.jdbc.PgConnection.commit(PgConnection.java:777)
Test Plan.
Add one Thread Group with default settings.
Add JDBC Connection Configuration with below setting.
Add JDBC Requset for Simple select stement.
Add Constant Timer with 5000 miliseconds Thread Delay.
Add View Results Tree.
My DBServer Name : proddbtest1.xyz.com
SQL Instance Name: Prodbtest1\LIVE
I fill up this parameter value in DB URL and Driver class. In fact I download latest JDBC sqljdbc42.jar from Net and past at Lib folder.
After running my test plan still I get an error message
"java.sql.SQLException: Cannot load JDBC driver class
com.microsoft.jdbc.sqlserver.SQLServerDriver"
Can any one help me where I am passing wrong configuration settings.
As per Using the JDBC Driver article the correct Microsoft JDBC Driver class name is:
com.microsoft.sqlserver.jdbc.SQLServerDriver
you are trying to use the following one:
com.microsoft.jdbc.sqlserver.SQLServerDriver
^^^^^^^^^^^^^^
So replace jdbc and sqlserver and your setup will work.
Also don't forget to restart JMeter to pick the sqljdbc42.jar up.
Just in case see The Real Secret to Building a Database Test Plan With JMeter article to learn more about database load testing using JMeter
I'd like to know the mechanism of performance testing Database by Jmeter, so need your help on my concern as below:
Q1. Does Jmeter will access directly to Database for testing ? Or,
it will access to database via a website having database URL (as the Database URL on JDBC request config) ?
Q2. which fields will be tested in Database : capacity or Database structure or others ? - please explain in advantage.
Besides, Jmeter is a good tool for testing database ? - which cases / why should we use ?
Thanks,
Q1: JMeter has JDBC Request sampler which can connect to database directly assuming appropriate JDBC driver in JMeter classpath and proper JDBC Connection Configuration
Q2: It's totally up to you as JMeter doesn't test anything. If you specify a query or a set of queries under Transaction Controller JMeter will report the time which queries took under the load and errors if any.