You sat down at the computer to download from the Internetmovies or music. The search engine immediately issued a site, the description of the page which is entirely consistent with your desire. Click the link that leads to the desired section of this site, but ...
Error 503 ...An unpleasant surprise, right? This site is probably the only one where music / movies can be downloaded for free. And then such a bummer - it is impossible to enter. Updating-updating the page - the server error 503 pops up all the same. Some people drop out of this business and search for content on other sites. And some seek to find out the cause of the problem in order to further avoid such misunderstandings. Here for them I will describe today the factors entering the page of the inscription "Error 503".
What does this mean?That is the way the first question sounds among stumbled upon the page with this problem. The name of this error means that the service is temporarily unavailable. So it's not for long? The answer to the question of whether the site will be unavailable for a long or not very long time depends on its technical capabilities, as well as on you and other visitors to the resource. No, you are not confused words, site visitors can also be the cause of this error. But let's get everything in order. So, there are only two factors for the emergence of a window called "Error 503" - technical and user.
Первый присутствует в том случае, если на the page had some kind of failure, because when you click on a link, the user goes to a blank page (for example, MySQL database is temporarily not working). Then the site administrator places on the page the code of this particular error, so that when typing the exact address of the site, the search engine does not remove the page from the search results, because he sees that it is temporary.
But still, 503 is an error most often provoked by users and system problems of their computers. The following is a list of similar reasons.
Transfer of large files in the PHP language
To transfer files, you need to use a special process that processes several streams at the same time, without affecting the speed of loading the site.
User problem solving
The functionality of multiple scripts for storing documents can be implemented through the mod_rewrite rules in the .htaccess file.
Connecting to a remote server
It is necessary to set a small pause for waitinganswer and make sure that the connection to the remote server is sufficiently reliable. If PHP scripts use Include functions that load engine parts located on the same account, make sure that they use not a local URL like http: // ..., but a local path. The presence of the URL causes the server to create an additional HTTP request - this slows down the loading of the site.
Big number spoiled or "Heavy" CMS components
Check all plugins and CMS components by turning offthem in turn, find the most spoiled or “heavy” ones that slow down the site loading. If possible, reject such components or look for faster counterparts. Also remove all unnecessary components that are not used by you or whose operation is not mandatory.
Long running task mambot (for Joomla)
If there are tasks among mambot that canmove to system cron, then do it. The mambot tasks are performed along with the user's request, and because of this, the site loading either does not occur at all or is very slow.
Mailing List
The mailing script is most convenient to putin the system cron (its management is on the control panel). And assign it to run at the time of the lowest load on the server (at night). At the same time, it is necessary to take into account the limitations in the terms of the offer agreement on the number of letters per hour / day and the running time of the PHP script.
- The resource contains links to too many files (JS-script style tables, images), which are added individually. Combine resources into one file where possible.
- The site has an element that sometimes sends AJAX requests to the server (for example, chat). The number of requests depends not only on the number of visitors, but also on the tabs and windows opened by them in the browser.
- Indexers that scan site resources (Sape, search engines, etc.).
- Using script elements or resources on other sites (informer scripts or links to pictures). Use the module / configuration anti-identifier.
- DDoS attacks.
That's all the reasons for opening the page labeled "Error 503". As you can see, not only the server databases, but also visitors to the site are to blame for this.
