Slow page load on organisation summary

[mbarton]

In production: ~3s
Local dev: 1.5s

We need to profile and see which queries are slow on this page. It shouldn't be KPIs as they are still updated at write time. It will inevitably be slower in production as the DB is now in a separate instance but we can probably reduce the overhead by changing CONN_MAX_AGE from the default (new connection every request).