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  • Firefox: Clear History Is SUPER EFFECTIVE?

    - by acidzombie24
    I'm seeing a performance problem on certain sites (like gmail) which clearing the history should not affect. Is this a website problem or a firefox problem and what can i do to fix it w/o clearing my history? Also as a webdeveloper i am interested in how to make this happen (or not happen). I'm using firefox 8 and i confirmed the problem by copying my profile to firefox 11 (portable). To reproduce go to gmail.com and sign in. Have your task manager open. Once you click signin or hit enter gmail will bring up your emails. Keep your eye on the CPU usage. I checked and right now on this machine its using all my CPU for 22seconds!!!! Yes. 22 seconds. Once i cleared my "browser & download history" Its <6seconds. WTF. I have no idea why or how the size of history and CPU usage when loading up gmail are correlated. I have firefox setup so it never clears the history. But... 22seconds is a disaster. Can someone explain why this is happening or a fix that isnt clearing my history? I tried visiting a few websites and only gmail eats up that much CPU. Most websites only take <5sec of max CPU. So maybe this is a gmail problem? Or a firefox problem that gmail happens to hit? I still dont understand why it happens. -edit- I forgot to mention places.sqlite is 90mb. I dont think that matters. I have a sqlite file 400mb which is pretty much 2 large tables. It has no performance issues

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  • New to server admin, Diagnosing Memory and CPU issues on DV

    - by G Thompson
    Sorry for my ignorance and lack of knowledge. I'm a PHP/Front-end developer just now venturing into very minor server management/diagnostics. I have a Media Temple DV account. I have 2 sites that run a PHP script through a subscription service to an API. Basically API hits site with said script. Script runs, gathers data from api, saves data to SQL database. I noticed that these sites seemed to causing memory overages on my server (not sure why). So I temporarily disabled them. The memory overage alerts stopped but my CPU still sits really high, like at 115% and above. I'm trying to diagnos this with tutorials and resources but just can't seem to find a solution. I'll attach screenshots(screenshots are without the PHP scripts I assume are responsible for the memory issues) I'm assuming are important to the diagnosis, but if anyone can point me in the right direction to start A. figuring out if and why the PHP script may be causing memory overages and B. Why my CPU is always over 100%. Thanks guys! Links to screen shots... can't post with low points. http://i.stack.imgur.com/A64k4.png http://i.stack.imgur.com/qm1rV.png

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  • What should I encrypt in Debian during install?

    - by ianfuture
    I have seen various guides and recommendations on web about how best to do this but nothing that clearly explains the best way and why. So I understand there is a need for part of Debian during install to be un-encrypted on its own partition to allow it to boot. Most info I have seen is call this /boot and set the boot flag. Next I believe the best approach is to create another partition out of all the rest of the disk space, encrypt this, then on top of that create a LVM and then within the LVM create my various partitions , name them , select size, and file system type. Can I include /swap in the encrypted LVM part ? Is this approach sound? If so what are the partitions I should use (this is going to be a minimal server install with a view to install as and when what I need for a dev server)? Finally how does the installer know what to put in each partition I define ? I appreciate there are more than one question but any help and suggestions would be appreciated. If further clarification is needed please mention in the comments . EDIT : 16/3/2010 After Richard Holloways reply I thought it relevant to add this info: The reasons why I want to do this are to explore maximising security on any server install and set up, due to interest in the area of Computer Security and Forensics. Also I am trying to peform the task as if it being performed in an enterprise situation. On a technical matter, once set up and configured with minimal packages and ssh this server will not physically be easy to access so I will only be entering via ssh. (Yes I know why encrypt something no one will ever be able to get their hands on? Because I can and I want to is the simple answer, but see above too).

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  • mysql disk io keeps increasing ... is that normal?

    - by trustfundbaby
    So I've been trying to figure out this disk IO problem I have been having with my linode VPS. Over the last day or two I've just left watch -n1 pidstat -d running in a console window and the output looks like this: Monitoring it over the last few days, I've noticed that my problem lies with the init, searchd, and mysql processes. Searchd is sphinx and all its indexes are on disk, so disk io there is inevitable (apparently). What I can't understand is why the disk reads (kB_rd/s) for mysql refuse to stabilize and just keep going up. It started out at 154 yesterday and is up to what you see in that screen shot. but disk writes (kB_wr/s) have remained pretty constant the entire time. My VPS only has 768MB RAM, my mysql db has a size of about 220MB and after running mysqltuner.pl and reading a bit about it, I've been advised to set my innodb_buffer_pool_size to 220MB but I simply cannot afford to do that ... I have it up to 150MB. My question is twofold. Why does the init process have that much disk reading to do? Why is mysql doing so much disk reading?

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  • How the yin-yang puzzle works?

    - by Hrundik
    I'm trying to grasp the semantics of call/cc in Scheme, and the Wikipedia page on continuations shows the yin-yang puzzle as an example: (let* ((yin ((lambda (cc) (display #\@) cc) (call-with-current-continuation (lambda (c) c)))) (yang ((lambda (cc) (display #\*) cc) (call-with-current-continuation (lambda (c) c)))) ) (yin yang)) It should output @\*@\**@\**\*@\**\**@..., but I don't understand why; I'd expect it to output @\*@\**\**\**\**\*... Can somebody explain in detail why the yin-yang puzzle works the way it works?

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  • Python Wildcard Import Vs Named Import

    - by Dan
    Ok, I have some rather odd behavior in one of my Projects and I'm hoping someone can tell me why. My file structure looks like this: MainApp.py res/ __init__.py elements/ __init__.py MainFrame.py Inside of MainFrame.py I've defined a class named RPMWindow which extends wx.Frame. In MainApp.py this works: from res.elements.MainFrame import * And this does not: from res.elements.MainFrame import RPMWindow I realize that the wild card import won't hurt anything, but I'm more interested in understanding why the named import is failing when the wild card succeeds.

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  • Do you use NDepend?

    - by Karsten
    Hi I've been trying out NDepend, been reading a few blogposts about it and even heard a podcast. I think that NDepend might be a really useful tool, but I still don't see where I would use it. How do you use it? Do you use it, why? why not? I would like to hear about some down to earth real world examples.

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  • DCOMCNFG Question...

    - by Tony
    Hello, I have a COM DLL that I registered via RegSvr32 but it does not show up in DComCnfg. Any help as to why? I think I am missing a few registry keys, but I do not understand why I would, i thought RegSvr32 did that for me. Thanks for any help.

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  • Visual Sourcesafe, sharing: commits to wrong location

    - by Snake
    I have a project under my management. It has the following structure: $/Code/MainSolution $/Code/Branches I want to branch the MainSolution in $/Code/Branches So I do it, (it works perfectly), I set a working folder for that project and do a 'get latest'. But when I open that solution in Visual Studio 2005 it identifies every file as new (+ sign in front of the file) and when I commit it it goes to $/Data/NameOfTheBranch Why does it do that? Why doesn't it follow MY rules?

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  • gem install permission problem

    - by qichunren
    qichunren@zhaobak:~ gem install hpricot ERROR: While executing gem ... (Gem::FilePermissionError) You don't have write permissions into the /opt/ruby-enterprise-1.8.7/lib/ruby/gems/1.8 directory. current ligin user is qichunren, and qichunre user have write permission with .gem dir.I would like to know why gem not install files into my home .gem dir first?????Why my gem common first want to install files into /opt/ruby-enterprise-1.8.7/lib/ruby/gems/1.8

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  • MongoDB vs. Redis vs. Cassandra for a fast-write, temporary row storage solution

    - by Mark Bao
    Hi there, I'm building a system that tracks and verifies ad impressions and clicks. This means that there are a lot of insert commands (about 90/second average, peaking at 250) and some read operations, but the focus is on performance and making it blazing-fast. The system is currently on MongoDB, but I've been introduced to Cassandra and Redis since then. Would it be a good idea to go to one of these two solutions, rather than stay on MongoDB? Why or why not? Thank you

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  • .net thread safety

    - by george9170
    Why is locking a type considered very bad? For example, lock(typeof(DateTime)) I understand that static methods of any class in .net is considered thread safe, and that instance members are not. So it isn't necessary to lock DateTime while you are using it. The book I am reading doesn't explain why it is bad it just says it is. Any explanation will be great.

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  • UIpopover is presenting user with a 'done' button that I can't get rid of

    - by nickthedude
    I'm not sure why this is coming up I am porting my app into an ipad version and moving one of my views which happens to be a navigation controller into a uipopover. I did have a uibarbutton item on the view im porting with a "done" button to dismiss the navcontroller but I commented out that code and its still appearing, not sure why. I remember someone mentioning some versions of xcode are wonky with uipopovers anyone know which ones? im using 3.2.3

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  • AS3 Classes - Should I use them?

    - by Eric
    I'm working on a project in Flash CS4/AS3 and I have a document class set up but I am wondering about using that, as opposed to frame-based scripting. Most of what I have seen so far deals with how to create them, but doesn't offer much about why or when to use them. I know I can also pull in other classes beyond the document class but, again, why and when? Could I get some input from you fine people out there on usage/best practice, etc? Thanks

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  • javascript problems server side

    - by Ke
    Hi, I have a php script that uses some css/javascript tabs, they work on my local server but not when i upload to my online server. Just wondering if anyone knows why this might be the case? All the paths are correct, its basically an identical setup. I would be grateful to find out some reasons why the error appears on the server side, i thought javascript executed on the client side? Any help is much appreciated. Ke

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  • What is wrong with this WHERE clause?

    - by Victor
    Is there a reason why this query doesn't work? The following query will work if I just exclude the WHERE clause. I need to know what is wrong with it. I know the given values of $key exists in the table, so why doesn't this work? $q = "SELECT * WHERE t1.project=$key FROM project_technologies AS t1 JOIN languages AS t2 ON t1.language = t2.key"; Table's have the following fields: project_technologies - key - project - language languages - key - name

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  • Differences using JSON with MVC & MVC2?

    - by Dejan.S
    I recently started working with MVC or MVC2 to be more exact. I found a tutorial yesterday that was using JSON to populate a dropdowlist. Im not sure why this did not work with a MVC2 project and only with a MVC. Anybody got the time to just peep this site and maybe see what it might be? http://www.dotnetcurry.com/ShowArticle.aspx?ID=466. It's that JSON example, its homecontroler and the view code only I really want to know why thanks

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  • IE8 doctype changing

    - by user303378
    I am currently using an XHTML 1.0 transitional doctype on my vBulletin website. The page in question is PHP. The source (view source) of this page verifies that the XHTML 1.0 transitional doctype is on the page. Upon downloading (File Save As) the page in IE8, I realized that my doctype had been replaced with an HTML 4.0 transitional doctype. Why does IE8 change the doctype? Why isn't the doctype its chosen displayed in the "View Source"?

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  • Exception Specification

    - by atch
    Hi, guys I know that this feature will be depracated in c++0x, but for me as a total novice it seems like a good idea to have it. Could anyone explain to me why isn't a good idea? Thanks in advance. P.S. I know I've said it but I'll say it again: formating in this forum really pisses me off. Why can't I have ENTER as end of line but instead of I have to press space twice?

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