[EP-tech] Too many connections

George Macgregor george.macgregor at strath.ac.uk
Mon Aug 15 10:19:51 BST 2016

Hello colleagues.

Occasionally our EPrints suffers the "too many connections" MySQL connection error.  In the past when EPrints has suffered this error my assumption has been that there is a query hanging which then has a knock on effect on other queries as they can't write to a table.  We currently have max_connections set to 300 (which seems like a lot) but I can observe from previous chatter on the list that some go up to 1000.  I was therefore wondering what the community considered to be an appropriate connection limit?  Given all the traffic I can observe it is conceivable - however unlikely - that 300 is insufficient.  Have others observed something similar?

Thanks in advance!


George Macgregor
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