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Why does my application spend 24% of its life doing a null check?
... more expensive memory accesses. This is explained in more details in The MySQL “swap insanity” problem and the effects of the NUMA architecture where some solutions are given for Linux (spreading memory accesses on all NUMA nodes, biting the bullet on remote NUMA accesses to avoid swapping). ...
Why do people use Heroku when AWS is present? What distinguishes Heroku from AWS? [closed]
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Server Side Scripting Environment
Web server
Database Management System(Mysql, Redis etc)
Configure production server
Tool for testing and deployment
Monitoring App
High Availability
Load Blancing/ Http Routing
Service Backup Policies
Team Collaboration
Rebuild Production
If you have small s...
How to get first and last day of previous month (with timestamp) in SQL Server
... in the DATEDIFF() function. I know SQL Server does, but I'm not sure that MySQL does.
– daOnlyBG
May 22 '17 at 15:14
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Hibernate vs JPA vs JDO - pros and cons of each? [closed]
...leus and have it set up so that I can switch easily between using db4o and mysql. It's helpful for rapid development to use db4o and not have to worry too much about the DB schema and then, once the schema is stabilised to deploy to a database. I also feel confident that later on, I could deploy all...
Parameterize an SQL IN clause
...pe '$'
I prefer this approach to escaping because it works in Oracle and MySQL as well as SQL Server. (I usually use the \ backslash as the escape character, since that's the character we use in regular expressions. But why be constrained by convention!
Those pesky brackets
SQL Server also allo...
Transaction isolation levels relation with locks on table
...Spanish).
By the way, you can set the isolation level on RDBMS as well:
MySQL isolation level,
SQL Server isolation level
Informix isolation level (Personal Note: I will never forget about SET ISOLATION TO DIRTY READ sentence.)
and on and on...
...
ab load testing
...how everything performs together: including complex PHP code, and multiple MySQL queries...
For example here is the results of testing a fresh install of Wordpress on the same system and WAMP environment (I'm using WampDeveloper, but there are also Xampp, WampServer, and others)...
Requests per se...
Eclipse Workspaces: What for and why?
....
Oracle relies on CMake to generate a Visual Studio "Solution" for their MySQL Connector C source code. Within the Solution are "Projects" that can be compiled individually or collectively (by the Solution). Each Project has its own makefile, compiling its portion of the Solution with settings t...
How to design a product table for many kinds of product where each product has many parameters
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Unlike MySQL, SQL Server has extensive support for XML, XPath and XQuery. So for users of SQL Server, the best option would be to store extra attributes in a column of XML type (option 4). This way you DON'T have to "fetch the whole...
Why all the Active Record hate? [closed]
...database itself, tables, relations, even some logic if the DBMS allows it (MySQL is also grown-up now)
A2) very often, there is more than a data store: file system (blobs in database are not always a good decision...), legacy systems (imagine yourself "how" they will be accessed, many varieties pos...