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QUESTION
What is a good mysql configuration for production setting?
The setting I am using currently is
...ANSWER
Answered 2021-May-19 at 22:16What you have doesn't look bad. Of course, you also say you're getting pool timeouts so clearly something isn't working!
I'd start by looking on the database side. Check the max connections allowed (default is 151, so that's probably not your limit unless someone turned it down, or it's a shared database). Also look at the active client connections, ideally at or near when you're seeing pool errors.
If you are frequently using at or near your max connections on the database side, turn that up. (DBA might want to weigh in on reasonable limits, based on your database server/container/whatever size.)
If you are seeing a lot (but not 151/max) of long-running client connections, look at what queries they're running and try to see if it's possible to rearchitect those parts of your application to use more granular connections. If it's not, you'll at least know you need to turn up the size of your client pool.
Try tweaking some of the numbers in an environment that approximates your production. There's nothing inherently wrong with having maxActive and maxIdle be the same, or even increasing minIdle if you want to increase your chances of having a valid connection in the pool when you need it. If your environment is pretty stable, you can also turn off testOn* to decrease the overhead of getting a new connection, though that is probably minimal impact.
It's not unthinkable that you might be leaking connections, which would mean that eventually you'll be unable to get a new one from the (now full but useless) pool. If this starts happening more frequently after your application has been running for a while, I'd pursue that. Logging would probably show you what you need to know, but a heap analysis certainly would if logging isn't sufficient.
QUESTION
We are grails 2.3.11 and have been using MySQL 5.6 (AWS RDS) with Hibernate
The existing runtime dependency for MySQL and hibernate is following
...ANSWER
Answered 2021-Apr-13 at 08:00I have been using an instance of Grails 2.3.11 with MySQL 5.7 via MySQL connector version 5.1.45 for a long time. So I would say that your general approach should work out fine, it is a valid and working combination.
QUESTION
I have a tomcat server and under tomcatFolder/conf/server.xml I got this tag Resource
...ANSWER
Answered 2021-Apr-11 at 23:30I'm not sure how to /override/, but you can define a value in setenv.sh
and use it in a configuration file. For example:
QUESTION
Local tomcat is not starting and it is failing when trying to creating bean that connects to Oracle DB. The error is java.sql.SQLRecoverableException: IO Error: Connection reset. The only change we made is, we used ojdbc8.jar dependency in Pom.xml earlier it has ojdbc6.jar. I am running the tomcat on jdk 1.8 library/java/javavirtualmachines/jdk1.8.0_162.jdk/Contents/home/jre/
We have imported the rds-ca-2019-root.der in to the cacerts file. library/java/javavirtualmachines/jdk1.8.0_162.jdk/Contents/home/jre/lib/security/cacerts
This is happening after updating the SSL_VERSION to 1.2 on Oracle 12.2.0.1 RDS server.
Here is the stacktrace.
...ANSWER
Answered 2021-Mar-01 at 20:00I was able to resolve this issue by updating the ojdbc6.jar to ojdbc8.jar in my local tomcat lib folder /Users/dev/apache-tomcat-8.5.60/lib
Thank you everyone
QUESTION
I have Grails 3.3.11
application, and I'm trying to deploy it on flexible Google App Engine
, however, I have some errors mainly produced from connecting to Google cloud SQL
, I made MySQL 5.7
instance on it and able to access it from my IDE and while I run the application locally,I searched for some solutions for theses errors but unfortunately, nothing worked for me, here are the exceptions
ANSWER
Answered 2021-Feb-04 at 06:16I'm following this Google Cloud Community documentation about Deploy a Grails app to App Engine flexible environment. If you are still unable to connect using IP address of Cloud SQL, try using the Instance Connection Name of your Cloud SQL instance in url
of dataSource
and additional MYSQL dependencies in build.gradle
:
application.yml
QUESTION
I have a basic test for an embedded database that I'm trying to get working for a java project. As it stands now I am able to save rows to the database with my entity repository object, and after the app finishes running, I can connect to the database with intellij and see those rows are still there. But then, if I comment out the save
methods and run it again, when I check the database after it finishes, the database is empty.
ANSWER
Answered 2021-Jan-25 at 22:18You use:
QUESTION
I have an application using Tomcat 8.5 connection pool, Java 8, and Multi-AZ AWS RDS MySQL database. In the last years, we had a couple of database issues that lead to failover. When the failover occurred, the pool was always able to detect the connection was closed (No operations allowed after connection closed) and reconnect correctly a minute later when the backup node is up.
Some days ago we had a failover that didn't follow this rule. Because of a hardware database issue, the database was unavailable and a failover took place. Then, when the backup node was up a couple of minutes later, we could connect correctly to the database from our desktop MySQL client.
Even several minutes after the failover took place and connectivity to database was recovered, the application showed logs hundreds of exceptions like:
...ANSWER
Answered 2020-Dec-06 at 13:03Try to add ENABLE=Broken in your connection string. For example : jdbc:oracle:thin:@(DESCRIPTION=(ENABLE=BROKEN)(ADDRESS=(PROTOCOL=tcp)(PORT=)(HOST=))(CONNECT_DATA=(SID=)))
QUESTION
I am trying to run Springboot application with Oracle DB. After executing
java -jar SpringBootHibernate-0.0.1-SNAPSHOT.jar
Getting below error of Unable to create initial connections of pool.
...ANSWER
Answered 2020-Sep-26 at 08:18From the logs you shared it seems like you are missing Oracle Driver
in your pom.xml
Go to your pom.xml,
scroll to the section and
add the following dependency
QUESTION
I've followed the instructions/example in the Grails Doc (https://docs.grails.org/4.0.3/guide/conf.html#multipleDatasources) and it still uses the default dataSource.
My application.yml contains:
...ANSWER
Answered 2020-Jul-15 at 14:36Edit / Update
I changed my service to the following and it's working correctly now. I thought I had tried this before but I must not have gotten the correct combination of things in place.
Note that the application.yml did not change.
class PictureService { def grailsApplication def assetResourceLocator def dataSource_identityDb
QUESTION
I ask some Huge List data select id 700000 time;
like this.
example
...ANSWER
Answered 2020-May-12 at 07:34What did you use datasource Class?
I hear that DataSource are has version.
develop and production
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