CODEWITHSUNDEEP
apachetypo3-flow
Mark Chhunlong
Mark Chhunlong

Reputation: 105

Warning message: garbage collection of typo3

Strange things happened

Session: Ommitting garbage collection because another process is 
already running. Consider lowering the GC propability if these 
messages appear a lot.

Does anyone can explain this warning log ? What is the problems ?

Upvotes: 0

Views: 92

Answers (1)

albe
albe

Reputation: 51

It means that two concurrent requests triggered a session garbage collection. This is nothing bad per se. If this log entry just occured once or twice, that was just the luck of the odds. Else depending on the traffic of your site, the default of 1% probability (ie. every 100th requests on average triggers a garbage collection) might just be too high and you end up with many of these log messages (and wasted cpu cycles). In that case you should consider reducing the setting TYPO3.Flow.session.garbageCollection.probability to something lower, maybe start with "0.1" meaning every 1000th request will trigger the garbage collection.

In case your session storage (default Data\Temporary\{Context}\Cache\Data\Flow_Session_Storage) keeps growing up afterwards, you need to increase the maximumPerRun setting, so the garbage collection can keep up with the amount of sessions your page creates. That is very unlikely to happen though.

Upvotes: 1

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