From b0065714968f5036430ba1bc4f7d788bd776f2f0 Mon Sep 17 00:00:00 2001 From: grossws Date: Thu, 9 Jul 2015 12:23:17 +0300 Subject: [PATCH] Add more info about JDK Add more info about standard tools from OracleJDK/OpenJDK --- README.md | 1 + 1 file changed, 1 insertion(+) diff --git a/README.md b/README.md index 327bdf6..60d309c 100644 --- a/README.md +++ b/README.md @@ -235,6 +235,7 @@ Notes: - To know memory status, run and understand the output of `free` and `vmstat`. In particular, be aware the "cached" value is memory held by the Linux kernel as file cache, so effectively counts toward the "free" value. - Java system debugging is a different kettle of fish, but a simple trick on Oracle's and some other JVMs is that you can run `kill -3 ` and a full stack trace and heap summary (including generational garbage collection details, which can be highly informative) will be dumped to stderr/logs. + Also default JDKs `jps`, `jstat`, `jstack`, `jmap` are quite usefull, take a look at their help. For more advanced cases use something like [SJK by Alexey Rogozin](https://github.com/aragozin/jvm-tools). - Use `mtr` as a better traceroute, to identify network issues.