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Nestor Mata Cuthbert [email protected]
Janeiro Digital
My dear earthlings
The Story × A sad non productive server
× Can’t work with more than a couple clients
× Sometimes even gets one client hanging for long time
× We even raised his salary and still can’t make it
× Because is not actually his fault…
Listen to the server × The server is not understood
× What it does and how it does it?
× Adjust the server as per the needs × The needs of the application × The needs of the users
The basics of any HTTP application
× Requests
× Threads
× Memory
× Disk I/O
× Processing (CPU)
× Database
× External
HTTP Requests × Not every request is the same
× Anonymous requests × Authenticated requests
× Requests are handled in a thread
× Every request takes memory
× Every request take processing
× They may be using disk, DB and/or externals
What to look for × When optimizing you don’t look for everything
× Look for hotspots
× Requests that takes too long
× Requests that generate locks
× Tune up memory/threads relation
× Tune up the max threads the server can handle
× Tune up DB according to it’s usage
× Where/when it breaks!
To the rescue: jMeter × jMeter is cross platform (made in Java)
× Can trigger multiple instances from different machines at once
× Can record your activity and then customize it
× Can assert
× Is configurable and programmable
× Can run many kind of loops and threads
Are we done yet? × We are never done
× An application and server needs to be adjusted over time
× Based on users and data growth