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Invalidating query cache entries table replication software

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By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. MySQL server seems to constantly lock up and stop responding on certain types of queries and eventually after couple of minutes of not responding give up with an error " MySQL server has gone away ", then hang again on the next set of queries, again and again. A web application Invalidating query cache entries table replication software the post-processed data for the user.

In basic terms the processing steps involved are compression of Invalidating query cache entries table replication software series data in per second resolution into per minute, hour and day resolutions. The "Time" column will keep ticking away synchronously until some sort of query wait timeout has been reached and then we get error " MySQL server has gone away ".

In seconds when it will be time to process new data again Invalidating query cache entries table replication software same lock up will happen. Query 1 is the replication process. Query 2 is the updating of the post-processed data. Query 3 is streaming unbuffered the newly replicated data for processing.

Automatically invalidate cache entries while...

Invalidating query cache entries table replication software is the Query 3 that eventually produces the error " MySQL server has gone away ", presumably because it is the first one to timeout. It looks like some sort of dead lock, but I cannot understand why. If I turn off either the Replication or the Query Cache then the lock up does not happen. Debian 7, MySQL 5. It may be worth noting that almost the same application is currently working fine on Debian 6, MySQL 5.

Try to reduce the query cache size significantly. Sizes in tens of megabytes are usually beneficial. Sizes in the hundreds of Invalidating query cache entries table replication software might not be. By clicking "Post Your Answer", you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.

Dear MySQL Gurus, These days...

MySQL configuration on both the Debian 6 and Invalidating query cache entries table replication software Invalidating query cache entries table replication software The same question was posted in DBA section but it had no Invalidating query cache entries table replication software after a week. Perhaps it is better suited here. I'm having the same problem a bit less severethe only "solution" I have found so far is to disable query cache I too disabled the query cache in the meantime, as it's the only workaround at the moment.

Your Answer

I'm still puzzled by why this is happening This is not a useful answer. The question is not about efficiency of query cache, but Invalidating query Invalidating query cache entries table replication software entries table replication software a specific dead lock problem associated with the use of cache. I want to tell you 2 important points about Mysql a Locks: If query cache is too large it leads to performance degradation because of cache overhead and lock.

Dear MySQL Gurus, These days...

So, larger the query cache, the more system time is used for locks, flushes, and overhead until cache management and this negates any benefit of query cache and diminishes database throughput. Sign up or log in Sign up using Google. Sign up using Facebook.

Try to reduce the query...

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Now replication between slave and...

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