CODEWITHSUNDEEP
phpmysqlperformancewebcpu
Sindre
Sindre

Reputation: 1

High clock speed vs multiple cores/CPUs in a web server

For a heavy load web server (multiple users/sites), what will you recommend for best performance:

In a head-to-head compare the E3 seems to be the better choice due to the higher clock speed: http://cpuboss.com/cpus/Intel-Xeon-E5-2620-vs-Intel-Xeon-E3-1270V2

The server is used to host CPU and IO-intensive PHP applications with a MySQL innodb database. I want to know if this server will be able to benefit from the extra cores, or if I will get better performance/cost with the higher clock?

Thank you.

Upvotes: 0

Views: 6169

Answers (2)

Jeroen Vermeulen
Jeroen Vermeulen

Reputation: 2491

I don't agree on Microtechie's answer.

PHP executes a single request on one core only. Probably most of the time not all cores are used. If you have a higher clockspeed, requests finish faster, and the same core can process another request.

So my advise: focus on clock speed.

See also: https://stackoverflow.com/a/2267651/1339585

Upvotes: 3

Rajeev Bera
Rajeev Bera

Reputation: 2019

There are two different situations that we can consider:

- One kind of processor that is just used for calculations for a single program.

In this situation, the Processor speed is more important as the user want the ability to do quickly and efficiently. Its not the case with web server.

- On the other hand the processor used for multiple programs running at the same time. ( concurrent processes)

The second is where multiple cores come in handy, as each program can be assigned to a separate core, thus freeing each program from 'bottle-necking' each other.

- From Intel :)

Software developers can no longer rely on increasing clock speeds alone to speed up single-threaded applications; instead, to gain a competitive advantage, developers must learn how to properly design their applications to run in a threaded environment. Multi-core architectures have a single processor package that contains two or more processor "execution cores," or computational engines, and deliver—with appropriate software—fully parallel execution of multiple software threads.

- In my opinion

Multi-core processors are good for multi-tasking and High speed processors are good for high performance applications. Most high performance applications, like 3D rendering and gaming, will eat up all the CPU power.

So you would need as many cores AND as much speed as possible.

Hope this explanation helps.

Upvotes: 0

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