Im going to move my blog to a jekyll blog engine, but i have a small vps and now it has alot of sites hosted, and not so much free memory at this day. And swap is off by default and i cant handle it.
I want to ask you how much memory jekyll process will use ?
Anyone can see ?
I think you didn't get that jekyll is a static blog generator, then it won't take memory on your web server at run time. It means that :
you can generate your site on any machine you want, with ruby and jekyll installed,
then move the genrated site into the web server, which doesn't need ruby and jekyll installed.
Does it make more sense now ?
Related
I have build an website using CI. I run it on my office computer with XAMPP. Today I got it on my PC but it is loading very slow.
I have tried the benchmark tools. Even the empty pages without queries and UI are not loading with a normal speed.
I have checked the rewrite mod. It is ON.
Any ideas where i have to look?
This is likely due to insufficient resources or limited specs of the host system. You may want to investigate whether there are any other processeses running that may be consuming excessive memory or CPU time. You should be able to find online instructions on how to do this for your system.
If that's not the case, you'd have to provide further details of your CI project such as a typical page load stack trace and or a link to a demonstrable version of your project / repository.
I'm currently developing a web-app, and I alternate between Windows and Mac dev machines for this.
My problem is that pages render extremely slowly on Windows, but it's not my Ruby code running slowly, but rather that static files are getting served slowly.
A typical page takes about 200ms to render and get served in dev (both Mac and Windows are similar here), but it includes about 50 static files (in production it's just 5 to 10, once they get minified and combined, but in dev they're still separate).
Those 50 files take about 1.5 seconds to serve on the Mac, but about 10 seconds on Windows. Which makes it quite tortuous to test things...
I've tried both Webrick and Thin, they are about the same.
Has anybody found this problem and know how to improve this?
I've tried changing the Webrick conf to ":DoNotReverseLookup => true", as suggested in this answer, but it's not helping.
Any help will be greatly appreciated
Thanks!
Daniel
You are running into two existential problems that have plagued Ruby developers for a long time:
Webrick is slow. Always. Just don't even bother.
Ruby is always slower on Windows. Sometimes by orders of magnitude as you've found.
So if you insist on doing development on Windows proper (as opposed to developing only on Linux or developing on a Linux VM running on Windows), then we need to figure out some ways of putting lipstick on a pig.
Some ideas:
Make sure you run the latest version of Ruby.
Try deploying nginx with Thin as shown in this helpful albeit dated tutorial. This will help you get the most out of Thin's multithreading and asynchronicity.
Use Capistrano to deploy to Windows via this also dated GitHub project.
If you do decide you've had enough of developing Rails on an environment it wasn't designed for, you can set up a VM in the manner described here. The author reports significant speedup.
Use an Ubuntu VM inside VirtualBox, it's probably much closer to your deployment environment then mac and windows which means less "but it worked in development" troubles in production.
Also, you will save yourself a lot of time dealing with quirks of different ruby/gems implementations and various levels of headache due to native extensions.
You can:
set up internal network so you can use browser under windows to browse the app running inside the VM
use something like putty to open console sessions to VM
share a Dropbox/Sparkleshare folder with your Ubuntu VM so you always have same code between Windows and Mac box and Ubuntu VM
and this enables you to use your favorite editor under windows/macos to edit files inside the VM
you can use that same VM under Mac too
Ubuntu installation under VirtualBox is fast, easy and well documented, it's pretty much just a wizard. Alternatively, you can try finding a good vagrant recipee (see http://www.vagrantup.com/) or ask around to see if a colleague of yours would be willing to share his/her vbox.
I experienced a performance decrease on development (due to real-time compilation) working with projects with a large number of assets, but I was not on Windows.
I assume the large performance difference may be caused by some inefficient asset compilation under Windows.
I don't any Windows development experience, I haven't been using a Windows machine for a long time, however I registered a noticeable performance increase in parallel asset processing (in development) when I switched to multi-thread servers, specifically Puma. Keep in mind that, in any case, the default Rails webserver (Webrick) is very inefficient.
As Konstantine explained in this answer, there are currently several choices available. You can group them by the processing mode.
Skipping all the background history about Ruby threads, multi-process etc, I'd invite you to try Puma in your machine and see if it improves the load.
Puma works better with Ruby implementations that offer real multi threading, but quoting the official readme
On MRI, there is a Global Interpreter Lock (GIL) that ensures only one thread can be run at a time. But if you're doing a lot of blocking IO (such as HTTP calls to external APIs like Twitter), Puma still improves MRI's throughput by allowing blocking IO to be run concurrently (EventMachine-based servers such as Thin turn off this ability, requiring you to use special libraries).
Puma is designed to provide a simple and high performance request/response pipeline to Rack apps.
Yet my site pages load very slowly. Usually there's a 2-3 second lag before the page renders, and I cannot figure out why.
My site is powered by Wordpress v3.4.2.
I'm on a dedicated virtual server with plenty of resources and
bandwidth.
There are no huge images loading.
My CSS files load before JS scripts.
I've spent a lot of time trying to optimize the site within the constraints of the platform (Wordpress + plugins, etc). I don't expect my site to be SUPER fast, but I need it to not be SO slow.
I'm using Chrome's developer tools to audit my site but the suggestions do not appear to explain the long load time (unused CSS rules, etc). When I look at the timeline, I see a 2.7x second load time initially but I can't figure out why. Can anyone help me get to the bottom of this?
My site is located here. The homepage has some extra scripts, so it may be more helpful to look at this page.
I found this superb guide which really helped me fight through the mire of optimising Apache for use with WordPress:
http://thethemefoundry.com/blog/optimize-apache-wordpress/
You said you have a virtual server so chances are it's currently set up to load EVERY module - you'll find a great speed boost here if you eliminate unnecessary modules. Keep a backup of your config file in case you screw it up.
Also - use the TOP command through SSH to see how much memory PHP is using. Probably a lot currently. This will all be improved through eliminating modules as per above link. You don't mention how much memory you have on your VPS but there's a good chance your performance issues are coming from memory thrashing which will be mitigated significantly by reducing how much memory each PHP instance consumes using the link above.
Also, it matters to find out where your performance issues are actually coming from – a great little plugin called WP Tuner helps me locate performance bottlenecks. The original plugin is incompatible but someone else has written an upgrade:
http://www.wwvalue.com/tuts/tut-wp/wordpress-profiler-tuner-revised.html
That will help you identify which specific parts of the page are taking the longest to load so you will immediately find your performance bottleneck.
In addition, a cool plugin called Debug Queries is useful for tracking down performance issues although the wordpress profiler above actually does track queries too.
Finally – I can’t recommend highly enough this WordPress.org discussion on performance, and specifically on W3 Total Cache vs Super Cache (both are excellent).
It’s a fantastic read for anyone looking for split-second response times:
http://wordpress.org/support/topic/wp-super-cache-vs-w3-total-cache
I use W3 total cache on one of my sites and WP Super Cache on another. Both are great. I used both so I could learn about both. I would say use WP Super cache plus all the other tools the guy at the link above recommends if you're looking for extreme performance, but if you're looking to get immediate performance W3 total cache is more comprehensive in its initial setup.
Hope that helps.
use caching plugin,
put JS files at the bottom,
try different webhost (DB server may be slow sometimes)
minify css and JS,
make fewer HTTP requests
make sure external services (like FB and others) are not slowing down (remove
them and see if it helps)
run Yslow or similar test
try to use typekit or google font instead of cufon
Have you tried http://wordpress.org/extend/plugins/wp-super-cache/ or a similar caching plugin?
I started a small web project and used Drupal to build it. So far, so good: you can quickly set up a nice CMS oriented site, add social features via modules, and you have an extensive API to do the customizations in a nicely architected platform.
The problem comes now: the site is growing beyond what was originally planned for and I find myself in the situation of seriously starting write code for it. While I gained a new respect for PHP thanks to the Drupal project, I want to do it in Ruby. I'll feel more confortable, it'll be easier to maintain later and I can reuse it in other Ruby/Rails apps. Over time I suppose I'll rewrite the existing parts in Drupal in Ruby.
Based on this, the question is: has anyone integrated both (both a success or failure story)? It's quite a big decision, and I just can't find info about anyone who has done it on Google.
Sorry to be negative. This doesn't sound like a good idea to me.
I'll feel more confortable, it'll be easier to maintain later for me and I can reuse it in other Ruby/Rails apps.
I seriously doubt that. It will probably be more difficult to maintain/reuse in the future because of the extra code you will need to write to "integrate" Drupal and Ruby. The more the code, the more the likelihood of bugs. I'm assuming you're going to link the two together using REST/webservices/similar technology -- if that is the case you are writing so much extra code! Gluing the front end elements (which have to be in Drupal) with the functional elements (probably in Ruby) justs sounds so complicated to me.
I'm guessing its only you who is going to be maintaining the code. What if its someone else? Will you easily be able to find someone who has two skill sets (Ruby + Drupal) in your area/budget?
What about giving back to the Drupal community? If your code becomes something useful and its this big mess of Drupal + Ruby you really can't put it up on Drupal.org for others to build, improve and test.
I suggest two options
Use Drupal only.
Sounds like you're in love with Ruby or at any rate just too used to it. In that case: Find a Ruby based CMS! (Sorry I don't know any!)
To me its a classic dilemma: Should you do Drupal Custom Module development which will mean more short term pain cause you'll be out of your comfort zone.... or should you integrate Ruby + Drupal which will be easier in the short run but very painful in the long.
I would choose short term pain :-)
I think the term used to describe your idea is Polyglot Programming: http://memeagora.blogspot.com/2006/12/polyglot-programming.html
One of my criticisms of Drupal is that everything is in Drupal or PHP. Drush is an exception of course but it would be nice to see some development tools that don't use the Drupal stack exclusively. I have used Apache Ant on Drupal with some success (before the days of Drush).
I've also worked on a Drupal project that provided Software as a Service to a Java front end. That didn't work too well but the Drupal Services project has enjoyed some renewed development since then. I've also worked on several Drupal projects that interface with flash front ends (ugg!), google maps and mobile phone gadgets.
Are you thinking of a Service Orientated Architecture? If you're comfortable with that then you could be on the write track to writing truly agile software. I'd like to hear how you go!
However, if your only justification is that your feel more comfortable in Ruby (and I can see why) then, you should probably get yourself out of your comfort zone.
as the single user / developer on a drupal website im experience serious performance problems. several issues occur:
usually i develop drupal on our company dev server but now im at a client's office. the IT guys installed a VM with WAMP on the server they usually use for .net development. on the first day of dev (installing drupal, required modules and configuring them) httpd.exe would max out the cpu and loading any page would take minutes. IT guys just scratch their heads.
i then just installed WAMP on the local machine they gave me: some 299,99 Win XP Dell piece of sh*t, nevertheless a P4 2.8Ghz 2GB Ram. the fan blows so loud the entire office is giving me dirty looks. Again httpd.exe maxes out. again, any page (esp admin ones) takes minutes to load
in firefox, the views UI is completely unworkable. alot of stuff is loaded with ajax and it again takes minutes to see the various html elements dynamically inserted in the UI to appear - try to imagine this.
Chrome seems to handle the JS a bit better but it still takes way too long to complete any kind of action.
the devel_themer module ads tons of markup to the page which leads to "Allowed memory size of X exhausted" errors (memory_limit = 128MB ).
now im at the themeing stage where i need to do a LOT of page refreshes. I NEED firebug which requires firefox which in its turn eats up CPU and RAM. What usually takes seconds now takes minutes and by the time whatever action is completed, i forgot what i was doing. im basically reading news stories in between every page reload.
now, i know drupal is resource intensive but that its impossible to develop on a typical Dell / Win XP machine is a bit much, no? at home i work on an iMac and everything runs silky smooth.
i cant imagine im the only guy with this problem since what im doing is basically drupal 101 (no custom modules so far ...). unless someone can offer a solution, im concluding that you basically can not develop a typical drupal site on a normal home desktop computer.
what gives?
So you have abandoned the VM,check you php.ini file for the memory limit, increase it and see if there is a performance boost. its usually set to a default of 16M.
HTH
I'd suggest you either make sure to spend some time actually tuning your XP system, because the default WAMP config is definitely suboptimal, or consider an alternative, like Zend Server community edition (ZCE). Although not completely free as in speech, it is free as in beer, and simply builds up on top of a better default config for Apache and MySQL.
Although less convenient than WAMP or ZCE since not bundled, a manual install of Apache 2.2 is also usually a good choice.
Also note that, that the way devel_themer works, it is constantly building files in your temp directory, meaning that unless that directory is cleaned regularly, files will accumulate and directory browses will become exceedingly slow. Only a cron.php run will cause drupal to clean those files, for an up-to-date version of devel. See my patch adding this cleanup at http://drupal.org/node/303443
Finally, you mention Firebug, and you might be using the Drupal for Firebug module, which has known performance issues, apparently related to infinite recursion in some cases; although recent versions are supposed to fix this problem. See for instance http://drupal.org/node/303443
A couple things I've run into that could potentially help.
Unless you actually need it, turn off Locale. It causes a ton of extra queries (at least the last time I looked into it, this may have changed) so if you're not using it then don't put the unnecessary load on your DB.
Just like on a regular development machine, make sure MySQL is properly tuned and configured. This goes for any setup; local, development or production. 3/4 of the time the database is the bottleneck so start there.
If you've got the devel module installed and enabled it should have a query log you can tell it to output at the bottom of the page, this should help you with number 2.