We have a large number of sites and a large amount of data. Very often Piwik crashes for us when we use a dateinterval for three months or six months. The year alternative works fine.
Is there some way you can optimise the data loading for dateintervals?
Perhaps you could pre-generate reports for the dates 3 months and 6 months. It is a standard to split the year into quarters 1-4. So a pre-generated report for Q1, Q2, Q3 and Q4 would solve the problem.
Hope you like my idea and that it can be done easily for you.
At least you should be aware there’s a problem with dateintervals for large installations with Piwik.
Let me know if you have any questions.