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Questions tagged [high-load]

All aspects of high-loaded systems development and maintenance.

All aspects of high-loaded systems development and maintenance: design, algorithms, architecture, technologies, development, testing, databases, storage, support, hardware, hosting, management.

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How to increment a Mysql Integer Field on Highload using PHP

I got the following problem: When I try to increment one column of my mysql table the value get out of sync on high traffic loads. The task is splited into two things incrementing the column and add a new row to another table. So if I add 100 rows…
funktioneer
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Is using PHP with full-stack framework for highload project a bad idea?

I know that PHP code is compiled to the bytecode and reexecuted on every run (i.e. on every page request). So engine should redefine all used classes, functions, variables, etc. on every request. When using full-stack frameworks like Laravel or…
Andrew Starostin
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Concurrent connections with PHP+Redis on highload

Is there some mechanism for working with data in high concurrency? First we used mongodb and it has atomic updates that solving problem. But updates freq grossing to about 1000\seconds and we setup Redis to help mongo and writed syncronisation…
vuliad
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Building a high-load database on Java + MySQL

I am trying to build an application, that uses MySQL at the database level. The main table in it right now is about 10 Mbytes. However, the client specified that this application should be able to store about a billion of records for this table per…
SPIRiT_1984
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What type of cache better to use to improve performance of website?

I have high-load informative website with 10 000+ hits/day. It was rewritten on Symfony 2 Framework with Doctrine2 ORM. Site have heavy informative pages, each load on development server 0.5 - 1.5 seconds approximately. Note, that it time on…
Victor Bocharsky
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Best way to avoid data loss in a high-load Django app?

Imagine a quite complex Django application with both frontend and backend parts. Some users modify some data on the frontend part. Some scripts modify the same data periodically on the backend part. Example: instance = SomeModel.objects.get(...) #…
Spaceman
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RMI: many requests, one data

I have RMI server with 2 methods: first changes some value in an array, second reads some value. Array is located in the server's memory. And I have a lot of (1-∞) clients, which call these methods. What happens when a few clients try to change the…
sinedsem
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Cassandra have slow(rpc timeout) read request with long IN operator

I have next table structure: SELECT * FROM v WHERE uid = 0x5103be34e695ba3c31000000; uid | cid | v ----------------------------+-----------+------- 0x5103be34e695ba3c31000000 | 02j1Dy9G1 | True …
Dimetrio
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Building Turn-based Multiplayer Game Server

I started to make multiplayer game but as I have no expirience I tried it different ways but something doesn't feel right to me. So, I really need an advice about which platforms/tools/languages/techniches I should use best. I must say that I don't…
bobby
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Library to create high-performance server applications

I remember finding a C++ (or maybe plain C) library which does thread pooling, socket polling and other stuff, needed to write a high-performance server on Linux. (And this library was not Boost itself — but it could be that it used Boost.) As…
Alexander Gladysh
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LEMP Nginx + php-fpm high load timeouts then fine

I'm pretty new to all of this but I'm OCD about optimization. I'm trying to optimize my web server running a LEMP setup for wordpress. I'm using WP hypercache instead of w3 total cache as it seems to perform phenomenaly in comparison with my…
user1419367
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The most reliable way to download data over HTTP

What is the most reliable choice of programming language / technology to perform requests and, most important, retrieve correct and full responses from an HTTP server which is under very heavy load, often yielding HTTP 503 Service Unavailable or…
user1407902
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Best way to delete members of one set from multiple other sets

Let say I have a community with 50 000 members. So there are one Redis set called community_###_members with 50 000 sha1 keys of users and for each user his own set user_###_communities exists with sha1 hash of community above In some time I decide…
Mikhail Baranovsky
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can it be executed faster with big amount of data [MySQL]

is there any way how to optimize next query: EXPLAIN EXTENDED SELECT keyword_id, ck.keyword, COUNT( article_id ) AS cnt FROM career_article_keyword LEFT JOIN career_keywords ck USING ( keyword_id ) WHERE keyword_id IN ( SELECT keyword_id FROM…
user1016265
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Limits for Telegram bot

We're trying to implement telegram bot as notification tool for high load system. We're afraid of limits and bans from telegram in case of such huge amount of messages. In official doc and FAQ I found the information about limits such as 1 message…
Nik Again
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