rails.git - Mirror of official rails repo with custom fixes.

	Commit message (Collapse)	Author	Age	Files	Lines
*	Backport explain fixes.	Rafael Mendonça França	2012-09-16	1	-1/+2
\| \| \| \| \| \| \| \|	* Mark as SCHEMA some schema database queries. #7648 * Don't explain queries except normal CRUD sql. #7657 Closes #6458 Closes #7544
*	let automatic EXPLAIN ignore CACHE notifications	Xavier Noria	2012-02-03	1	-1/+4
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*	moves some auto explain logic to the subscriber [José Valim & Xavier Noria]	Xavier Noria	2011-12-04	1	-2/+12
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*	simplifies ActiveRecord::ExplainSubscriber [José Valim & Xavier Noria]	Xavier Noria	2011-12-04	1	-8/+6
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*	implements a much faster auto EXPLAIN, closes #3843 [José Valim & Xavier Noria]	Xavier Noria	2011-12-04	1	-0/+13
	This commit vastly reduces the impact of auto explain logging when enabled, while keeping a negligible cost when disabled. The first implementation was based on the idea of subscribing to "sql.active_record" when needed, and unsubscribing once done. This is the idea behind AR::Relation#explain. Subscribe, collect, unsubscribe. But with the current implementation of notifications unsubscribing is costly, because it wipes an internal cache and that puts a penalty on the next event. So we are switching to an approach where a long-running subscriber is listening. Instead of collecting the queries with a closure in a dedicated subscriber, now we setup a thread local. If the feature is disabled by setting the threshold to nil, the subscriber will call a method that does nothing. That's totally cheap.