XA requires a real transaction manager likeīitronix.
#JPROFILER 5.0 1 DRIVER#
Consult theĭocumentation for your specific JDBC driver to get this class name, or see the table below. This is the name of the DataSource class provided by the JDBC driver. If you come asking for support on an issue that turns out to be caused by lack time synchronization, you will be taunted publicly on Twitter. Configure time-source synchronization inside the virtual machine. Do not rely on hypervisor settings to "synchronize" the clock of the virtual machine. Especially if your server is running within a virtual machine. It is imperative that your server is synchronized with a time-source such as an NTP server. ? HikariCP relies on accurate timers for both performance and reliability. ? HikariCP uses milliseconds for all time values. Every property is optional, except for the "essentials" marked below. HikariCP comes with sane defaults that perform well in most deployments without additional tweaking.
#JPROFILER 5.0 1 FREE#
It could be demoralizing to see the result of hundreds of hours of thought and research co-opted so easily, and perhaps that is inherent in a free marketplace, but we are not demoralized. But the timeline of innovation, particularly in open source projects, is also clear and we want our users to understand the direction of flow of innovation in our space. And we understand that ideas can arise from the zeitgeist simultaneously and independently. We understand that product advancements, once public, are often co-opted.
#JPROFILER 5.0 1 SOFTWARE#
Open source software like HikariCP, like any product, competes in the free market.
"Imitation Is The Sincerest Form Of Plagiarism" - anonymous Read our interesting "Database down" pool challenge. We'd like to thank the guys over at WIX for the unsolicited and deep write-up about HikariCP on their engineering blog. In fact, oversized connection pools have a clear and demonstrable negative impact on performance a 50x difference in the case of the Oracle demonstration. Watch a video from the Oracle Real-world Performance group, and learn about why connection pools do not need to be sized as large as they often are. Read about the spike demand handling here.ĪKA "What you probably didn't know about connection pool sizing".
The customer's environment imposed a high cost of new connection acquisition, and a requirement for a dynamically-sized pool, but yet a need for responsiveness to request spikes. One Statement Cycle is defined as single Connection.prepareStatement(), Statement.execute(), Statement.close().ġ Versions: HikariCP 2.6.0, commons-dbcp2 2.1.1, Tomcat 8.0.24, Vibur 16.1, c3p0 0.9.5.2, Java 8u111ģ Uncontended benchmark: 32 threads/32 connections, Contended benchmark: 32 threads, 16 connectionsĤ Apache Tomcat fails to complete the Statement benchmark when the Tomcat StatementFinalizer is used due to excessive garbage collection timesĥ Apache DBCP fails to complete the Statement benchmark due to excessive garbage collection timesĪnalysis of HikariCP v2.6, in comparison to other pools, in relation to a unique "spike demand" load.One Connection Cycle is defined as single DataSource.getConnection()/ Connection.close().You can checkout the HikariCP benchmark project for details and review/run the benchmarks yourself. We have more than 4000+ system properties to configure the runtime and 600+ technology extensions libraries so it might be overkill unless one has a complex problem to solve and/or using the same tool across development, test and production is paramount.Microbenchmarks were created to isolate and measure the overhead of pools using the JMH microbenchmark framework. I should be point out that JXInsight is designed for software performance engineers and not just for the occasional adhoc profiling session. I am the architect of JXInsight so of course I am completely biased but at the same time I am probably more qualified than most in the Java industry to make such a claim since I have devoted the last 8 years to performance analysis for some of the most demanding of Java/J2EE application in production. JXInsight's Probes technology is also the only one that could even run in production considering that we out perform netbeans profiler by 20x and yourkit 100x in SPECjvm2008 benchmarks. None of the tools other than JXInsight perform real database transaction analysis: