Aws EC2 Disk Expansion

First, in the aws website control panel, right-click EBS directly, and then manually set the size of EBS. After setting, you can view the progress in the EBS list. When the progress reaches 100%, execute the following command: 1, sudo lsblk (View existing volume and partition information) 2, sudo growpart /dev/xvda 1 3, sudo resize2fs […]

JVM performance tuning monitoring tool hprof use detailed

Ⅰ Problem In real-world enterprise Java development, sometimes we encounter the following problems: OutOfMemoryError Memory leak Thread deadlock Lock Contention Java process consumes too much CPU …… These problems may be overlooked by many people in daily development (for example, some people encounter the above problems just restart the server or increase the memory, but […]

Ali Open Source Java Diagnostic Tool-Arthas

Arthas is an open source tool for Java developed by Alibaba recently. It mainly for diagnosing the problems of java. I. Overview This tool can help you do the following things: Which jar package loaded this class from? Why do you code throws various kinds of Exceptions? If you encounter problems on product environment , […]