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gemhome / fnordmetric

(possible new home for) FnordMetric is a redis/ruby-based realtime Event-Tracking app
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Document memory tweaks #14

Open bf4 opened 10 years ago

bf4 commented 10 years ago

Issue by kazjote Sunday Feb 05, 2012 at 09:46 GMT Originally opened as https://github.com/paulasmuth/fnordmetric/issues/57

As it causes a lot of confusion, I think we should document how to set TTLs properly, optimize defaults and provide some redis usage benchmarks for various gauges and traffic schemas.

For example: If somebody has higher traffic, he can reduce events TTL and sacrifice user history length but reduce Redis memory usage.

bf4 commented 10 years ago

Comment by fd Sunday Feb 05, 2012 at 14:42 GMT

This sounds like a good idea. I seem to have similar problems. After tracking 30-40k events/h for 24h results in 120Mb of RSS in Redis.

My TTLs are set to 60 sec (maybe to high; I don't know) Here is the snippet for collecting the stats: https://github.com/mrtesla/alice-router/blob/107781adab663d54687ef32e1b7f4645938805cc/router.js#L323