Hi George

 

                We ran into the same problem on the 11^th and 19^th of July. Apparently this was due to a robot/DoS issue of something hitting the repository very fast and using up all the connections.  My understanding that this sort of thing with the too many connections error should only be happening under these unusual circumstances but I’m sure others can contribute a bit more on what is an appropriate setting.

 

Cheers

Jonathan

 

(Nottingham Uni Library)

 

 

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

 

--

George Macgregor

Information Services Directorate | University of Strathclyde

Curran Building | 101 St James Road

Glasgow G4 ONS

Tel: 0141 548 3496

Email: george.macgregor@strath.ac.uk

Web: http://personal.strath.ac.uk/george.macgregor/

Twitter: @g3om4c

orcid.org/0000-0002-8482-3973
--

Ensure that your research outputs are eligible for submission in the next REF.  Authors' accepted manuscripts of journal articles and conference proceedings accepted after 01 April 2016 must be deposited in PURE as soon as possible after acceptance for publication – email openaccess@strath.ac.uk for further information or visit http://www.strath.ac.uk/openaccess.

 

--

The University of Strathclyde is a charitable body, registered in Scotland, with registration number SC015263

 

This message and any attachment are intended solely for the addressee
and may contain confidential information. If you have received this
message in error, please send it back to me, and immediately delete it. 

Please do not use, copy or disclose the information contained in this
message or in any attachment.  Any views or opinions expressed by the
author of this email do not necessarily reflect the views of the
University of Nottingham.

This message has been checked for viruses but the contents of an
attachment may still contain software viruses which could damage your
computer system, you are advised to perform your own checks. Email
communications with the University of Nottingham may be monitored as
permitted by UK legislation.