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Displaying posts with tag: page_cleaner (reset)

MySQL 5.7.4 Overview and Highlights
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MySQL 5.7.4 was recently released (it is the latest MySQL 5.7, and is the “m14″ or “Milestone 14″ release), and is available for download here and here.

The 5.7.4 changelog begins with the following, so I felt it appropriate to include it here as well.

In Memoriam:

“This release is dedicated to the memory of two young engineers of the MySQL Engineering family, Astha and Akhila, whom we lost while they were in their early twenties. This is a small remembrance and a way to recognize your …

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InnoDB adaptive flushing in MySQL 5.6: checkpoint age and io capacity
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In MySQL 5.6 InnoDB has a dedicated thread (page_cleaner) that’s responsible for performing flushing operations. Page_cleaner performs flushing of the dirty pages from the buffer pool based on two factors:
- access pattern  -  the least recently used pages will be flushed by LRU flusher from LRU_list when buffer pool has no free pages anymore;
- age – the oldest modified non-flushed pages are part of flush_list structure and will be flushed by flush_list flusher based on several heuristics.

There is a good …



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Introducing page_cleaner thread in InnoDB
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In MySQL 5.6.2 we have introduced a new background thread named the page_cleaner in InnoDB. Adaptive flushing of modified buffer pool pages in the main background thread, async flushing by a foreground query thread if the log files are near to wrapping around, idle flushing and shutdown flushing are now moved to this thread, leaving only the last resort sync flushing in foreground query threads. We’ve also added counters for these activities.

As page_cleaner is all about the flushing of dirty pages to disk it’ll do you a world of good if you can go through this post where I have explained …

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