memory

What do the two numbers returned by Python's resource.RLIMIT_VMEM (or resource.RLIMIT_AS) mean?

由 ぐ巨炮叔叔 提交于 2020-01-25 08:01:07
问题 Python's resource module allows getting and setting various system resource usage information. In particular, the amount of memory used by a process is available via resource.RLIMIT_VMEM (or, on some systems, resource.RLIMIT_AS as per this StackOverflow answer). When I run the following Python code (using Python 3.7) to print the memory usage, I see a tuple with two values: import resource print(resource.getrlimit(resource.RLIMIT_AS)) On Ubuntu 18.04, it prints (-1, -1) (which I interpret to

[linux] 查看内存型号

由 蹲街弑〆低调 提交于 2020-01-25 07:30:20
本文转载自： https://www.cnblogs.com/bluefrog/archive/2012/07/25/2607993.html 作者：bluefrog 转载请注明该声明。 最近想加内存,google了一下在 linux 查看内存型号的命令 $ sudo dmidecode -t memory # dmidecode 2.9 SMBIOS 2.4 present. Handle 0x000A , DMI type 16 , 15 bytes Physical Memory Array Location: System Board Or Motherboard Use: System Memory Error Correction Type: None Maximum Capacity: 4 GB Error Information Handle: No Error Number Of Devices: 2 Handle 0x000B , DMI type 17 , 27 bytes Memory Device Array Handle: 0x000A Error Information Handle: No Error Total Width: 64 bits Data Width: 64 bits Size: 1024 MB Form Factor: SODIMM

redis内存使用情况分析方法

由 拈花ヽ惹草 提交于 2020-01-25 05:34:10
※ redis内存使用情况分析： 1.安装rdbtools工具 pip install rdbtools python-lzf 2.对redis的持久化rdb文件进行分析（用-k选项指定筛选的key，支持pattern） rdb -c memory ./dump.rdb -k live:day_room* > result_day.csv // total 359,338,912 bytes, bigkey 19,767,100 bytes rdb -c memory ./dump.rdb -k chat:day_room* > result_chat.csv // total 35,305,791 bytes, bigkey 3711820 bytes rdb -c memory ./dump.rdb -k live:week_room* > result_week.csv // total 2,069,386,652 bytes, bigkey 25,811,572 bytes 3.将生成的csv文件导出到本地，用excel公式计算内存占用情况（对应列为size_in_bytes） ※ bigkey分析： 1.安装rdr工具 go get github.com/xueqiu/rdr 2.分析redis持久化rdb文件 rdr show dump.rdb 3.浏览器进入可视化界面

Android: Unable to play video from private path subdirectory using intent

由 久未见 提交于 2020-01-25 04:15:17
问题 I am able to play video from private path /data/data/com.exmaple.ui/files/final.mp4 this path. But unable to play from subdirectory like /data/data/com.exmaple.ui/files/myVideos/final.mp4, Intent intent = new Intent(Intent.ACTION_VIEW); File playFile = new File("/data/data/com.exmaple.ui/files/myVideos/final.mp4"); intent.setDataAndType(Uri.fromFile(playFile), "video/mp4"); startActivity(intent); File Creation code: String path = getFilesDir().getAbsolutePath(); File dest = new File(path,

using beautifulsoup 4 for xml causes strange behaviour (memory issues?)

由 断了今生、忘了曾经 提交于 2020-01-25 03:37:30
问题 I'm getting strange behaviour with this >>> from bs4 import BeautifulSoup >>> smallfile = 'small.xml' #approx 600bytes >>> largerfile = 'larger.xml' #approx 2300 bytes >>> len(BeautifulSoup(open(smallfile, 'r'), ['lxml', 'xml'])) 1 >>> len(BeautifulSoup(open(largerfile, 'r'), ['lxml', 'xml'])) 0 Contents of small.xml: <?xml version="1.0" encoding="us-ascii"?> <Catalog> <CMoverMissile id="HunterSeekerMissile"> <MotionPhases index="1"> <Driver value="Guidance"/> <Acceleration value="3200"/>

Garbage Collection not running for Code Cache Memory Pool

由 China☆狼群 提交于 2020-01-25 02:51:07
问题 When I am printing the details of garbage collection using GarbageCollectorMXBean the output shows me the following information:- Name: PS ScavengeCollection count: 72 Collection time: 3041 Memory Pools: PS Eden Space PS Survivor Space Name: PS MarkSweepCollection count: 5 Collection time: 4922 Memory Pools: PS Eden Space PS Survivor Space PS Old Gen Now quite rightly the ScavengeCollection and MarkSweep collection covers 4 of the 5 available memory pool excluding Code Cache (Non Heap Memory)

What is caching the image data in my Silverlight 4 application?

由 生来就可爱ヽ(ⅴ＜●) 提交于 2020-01-24 23:30:23
问题 Something is holding on to the images in my Silverlight application. This is a problem because this is a catalog application with a lot of images that the user can browse through. If the user browses through every library provided the application will run out of memory and crash. I know it is a problem with images because if I disable images the private working set never exceeds 170 MB. I have a user control ( DownloadImage ) that shows a progress bar while the image is downloading. It is the

DRAM 内存介绍(一)

由 淺唱寂寞╮ 提交于 2020-01-24 23:04:34
转载自博客大神迈克老狼的blog: http://www.cnblogs.com/mikewolf2002/archive/2012/11/13/2768804.html 参考资料： http://www.anandtech.com/show/3851/everything-you-always-wanted-to-know-about-sdram-memory-but-were-afraid-to-ask SDRAM(Synchronous dynamic random access memory)，同步动态随机访问内存，通常包括 SDR (Single Data Rate) SDRAMs以及DDR (Double Data Rate) SDRAMs.在显卡中常用的是GDDR SDRAMs以及HBM。 如图一所示，左边就是PC系统中常用的内存条，该内存条是双通道2G内存(dual inline Memory Module),通常简称为DIMM。我们可以看到内存条上黑色的128MB内存芯片，这些内存芯片简称为IC。该内存条是双面内存，就是说正反两面都有8个IC，总共16个IC，16*128M=2GB。DIMM的单面称作rank，比如下图的2GB内存条，它就是由rank1，rank2两个单面组成，每个面有8个IC。 图一，DRAM的组成 每个IC内部通常由8个bank组成(

VirtualAlloc C++ , injected dll, asm

由 南笙酒味 提交于 2020-01-24 12:18:29
问题 I want to reserve space for my codecave in application. I use VirtualAlloc function to reserve this space. I have X questions. What parameters (sllocation type and protection) should I use to allocate memory for code-cave? As return value I get address of my codecave. In other part of the program I want to JMP to that codecave. How to do it? I know (correct me if I'm wrong) that JMP takes as agument nuber that is offset from current location. But I want to JMP to ma codecave. How to calculate

ActiveMQ memory consumption through the roof (page file)… what to do?

由 僤鯓⒐⒋嵵緔 提交于 2020-01-24 12:13:21
问题 We're using an older version of ActiveMQ (5.3.2) (see: Is activemq reliable?) We've removed persistence because we needed more speed. Our worker can keep up with the messages, but, even though the queue typically is at 0 pending, after about 45000 messages processed (a message is typically 100 chars long), the Page file is 8GB!! It doesn't stop there though, it continues until 15 GB is reached (Our server has 16gb memory)! Stopping the ActiveMQ process doesn't clean up this pagefile, it
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