Java Tools

Cloudgarden's MemoryManager is a small plugin for IBM's Eclipse Java IDE, which displays the current memory usage of Eclipse (letting you know when Eclipse is close to using up all it's memory allowance), and automatically invokes garbage collection when deemed necessary by a simple but effective algorithm (see below), thus preventing or reducing times of forced inactivity while the Eclipse JVM cleans up it's virtual memory space.

The plugin takes up little screen real estate, and provides a visual and numerical display of the free, total and maximum memory allocations, as well as indicating when it forced a garbage collection (it also has a button to manually force garbage collection). In the screen shot, the green region represents the free memory, the red region the used memory (which is equal to the total memory minus the free memory) and the black region represents space for expansion. The blue lines indicate when a garbage-collection happened. Scrolling of the display can be paused and re-started, and past values can be stepped through as a simple tool for analysing memory usage by applications in the workbench.

The plugin is Open Source, (the source is here) and should work on most platforms (it has been tested on Windows, Linux and Mac).

Download

The plugin is contained in this file. Simply extract and install in your eclipse folder, then start eclipse.

Usage

Show the plugin by choosing "Windows->Views->Other->MemoryManager->Memory" in the eclipse main menu. The plugin will immediately start displaying memory usage and collecting garbage when necessary. Note: If total usage is less than half of the maximum allowed space, the display will be scaled vertically by a factor of two (ie, the height of the display represents only half of the maximum memory), but once the total memory excedes half of the maximum, the height represents the maximum allowed memory usage.

Requirements

Eclipse version 2.1.2 or 3M6. If run under a 1.3 JVM, the maximum memory cannot be calculated (since there is no such method in the 1.3 API), and the display will have no black area.

Garbage collection algorithm

1) At startup, or immediately after garbage-collection, find the free memory.
2) Keep checking free memory every second or two.
3) When the free memory drops below 75% of the free memory after the last garbage collection (or at startup), do another garbage-collection.

That's it - simple, but apparently effective.

posted on 2007-07-05 16:18 和田雨閱讀(524) 評論(0) 編輯收藏所屬分類: Eclipse

新用戶注冊刷新評論列表


只有注冊用戶登錄后才能發表評論。




網站導航: 博客園 IT新聞 Chat2DB C++博客博問管理
相關文章: 漢化Eclipse的方法 Eclipse插件之SQLExplorer 使用Eclipse Callisto分析應用程序 Eclipse 的歷史、現狀和未來 Sysdeo/SQLI Eclipse Tomcat Launcher plugin Log4E MemoryManager plugin for Eclipse 開發一個調試 JSP 的 Eclipse 插件

Java Tools

公告

常用鏈接

留言簿(2)

隨筆分類

隨筆檔案

BBS

LTD

OpenSource

Study

搜索

最新評論

閱讀排行榜

評論排行榜

Description