转自: https://blog.codecentric.de/en/2008/07/memory-analysis-part-1-obtaining-a-java-heapdump/ For troubleshooting Java memory leaks and high memory usage problems, the heapdump is one of the most important analysis features. The advantage of heapdumps…

小结: 1. 数据库连接池. JDBC语句和结果对象必须显式地关闭. 2. 电梯到目标楼层后地址是否被释放 When a button is pressed: Get some memory, which will be used to remember the floor number Put the floor number into the memory Are we already on the target floor? If so, we have nothing to do: fi…

安装MAT(MAT在eclipse的页面:http://www.eclipse.org/mat/downloads.php) 显示饼图的时候,需要安装BIRT Chart Engine插件,通过Install new software安装这个屡屡报错,加上greenvpn断断续续,纠结了好几天. 最后索性换一种安装方法: 重新安装带BIRT的Eclipse All-in-One This is the fastest way to get started with BIRT on Windows…

catalogue . 静态分析.动态分析.内存镜像分析对比 . Memory Analysis Approach . volatility: An advanced memory forensics framework . github-djteller-MemoryAnalysis . Awesome Malware Analysis Projects 1. 静态分析.动态分析.内存镜像分析对比 0x1: Static Analysis Challenges . Time consuming…

生成堆转储文件 新建项目,设置Eclispe Java堆的大小: (1)限制Java堆大小:将最小值 -Xms参数与最大值-Xmx参数设置一样可避免堆的扩展         -Xmx20m -Xms20m -Xmn10m -Xss1m (2)通过参数:-XX:+HeapDumpOnOutOfMemoryError,可以让VM在出现内存溢出异常时Dump当前内存堆转储快照         -Xmx20m -Xms20m -Xmn10m -Xss1m -XX:+HeapDumpOnOutOfMemo…

JDK内置工具使用 一.javah命令(C Header and Stub File Generator) 二.jps命令(Java Virtual Machine Process Status Tool) 三.jstack命令(Java Stack Trace) 四.jstat命令(Java Virtual Machine Statistics Monitoring Tool) 五.jmap命令(Java Memory Map) 六.jinfo命令(Java Configuration Inf…

1.介绍 打印出某个java进程(使用pid)内存内的,所有‘对象’的情况(如:产生那些对象,及其数量). 可以输出所有内存中对象的工具,甚至可以将VM 中的heap,以二进制输出成文本.使用方法 jmap -histo pid.如果连用SHELL jmap -histo pid>a.log可以将其保存到文本中去,在一段时间后,使用文本对比工具,可以对比出GC回收了哪些对象.jmap -dump:format=b,file=outfile 3024可以将3024进程的内存heap输出出来到out…

目录 一.jdk工具之jps(JVM Process Status Tools)命令使用 二.jdk命令之javah命令(C Header and Stub File Generator) 三.jdk工具之jstack(Java Stack Trace) 四.jdk工具之jstat命令(Java Virtual Machine Statistics Monitoring Tool) 四.jdk工具之jstat命令2(Java Virtual Machine Statistics Monitori…

from:http://chaosinmotion.com/blog/?p=696 Just because it's a garbage collected language doesn't mean you can't leak memory or run out of it. Especially on Android where you get so little to begin with. Now of course sometimes the answer is that you…

How to Use DTrace to Troubleshoot Java Native Memory Problems on Oracle Solaris 11 Hands-On Labs of the System Admin and Developer Community of OTN by Wang Yu, Vincent Liu, and Gary Wang This lab will introduce the basic concepts of DTrace and provid…