Correct transaction management. cf. bug https://openrdf.atlassian.net/browse/SES-2295 and tomcat default management of PUT request with form data (application/x-www-form-urlencoded encoded)
<IfModule mpm_event_module>
ServerLimit <%= @serverlimit %>
StartServers <%= @startservers %>
MaxClients <%= @maxclients %>
MinSpareThreads <%= @minsparethreads %>
MaxSpareThreads <%= @maxsparethreads %>
ThreadsPerChild <%= @threadsperchild %>
MaxRequestsPerChild <%= @maxrequestsperchild %>
ThreadLimit <%= @threadlimit %>
ListenBacklog <%= @listenbacklog %>
MaxRequestWorkers <%= @maxrequestworkers %>
MaxConnectionsPerChild <%= @maxconnectionsperchild %>
</IfModule>