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DISCOVERING & SOLVING
PERFORMANCE ISSUES
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Quick overview, rather than detailed look
What works for me, might not work for you
Introduction to some tools
Opinionated guide of practices
WHAT TO EXPECT?
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SYMFONY WEB PROFILER
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not shown, but also containing the web-profiler:
symfony/debug-pack
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{{ render(controller('App\\Controller\\GroupController::listAction')) }}
{{ render(controller('App\\Controller\\EventController::listAction')) }}
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How to Use the Profiler in a Functional Test
https://symfony.com/doc/current/testing/profiling.html
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It can be used to simulate a heavy load on a server, group
of servers, network or object to test its strength or to
analyze overall performance under different load types.
https://jmeter.apache.org/
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CAPACITY TEST
Determine how many users and/or transactions a given system
will support and still meet performance goals.
LOAD TEST
Verify application behavior under normal and peak load conditions.
STRESS TEST
Determine or validate an application’s behavior when pushed
beyond normal or peak load conditions.
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https://msdn.microsoft.com/en-us/library/bb924375.aspx
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Decorate original ApiClient with PSR-6 Cache
https://symfony.com/doc/current/service_container/service_decoration.html
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TYPICAL PROBLEM GROUPS
I/O Wait
CPU-Usage
Memory-Usage
Network-Latency
SQL-Queries
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HOW TO IMPROVE
PERFORMANCE?
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PHP 7
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DOCTRINE
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http://docs.doctrine-project.org/projects/doctrine-orm/en/latest/reference/improving-performance.html
METADATA & QUERY CACHES
it is strongly discouraged to use Doctrine without a Metadata and
Query cache (preferably with APC or Memcache as the cache driver).
ALTERNATIVE RESULT FORMATS
Make effective use of the available alternative query result formats
like nested array graphs or pure scalar results, especially in scenarios
where data is loaded for read-only purposes.
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APPLICATION CACHE
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HTTP CACHE & ESI
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DISCOVERING PERFORMANCE PROBLEMS
Overall performance & scalability?
Unspecified performance issue on
a specific page?
Worker jobs & CLI tasks?
Load & capacity tests using JMeter
During development: Web Profiler
In depth analysis: Blackfire
Blackfire
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GENERAL TIPS
Measure first, then change
Make changes in small increments
Search for causes, not symptoms
Verify assumptions & results with real data
Revisit old assumptions
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THANK YOU