I) What is Varnish? Varnish Cache is a caching HTTP reverse proxy, really fast, and which is basically able to cache your page depending on the http headers set by the application. However PrestaShop doesn’t have a mechanism to control the HTTP header, and what should be cached / not cached. Hence, it’s not possible […]

I) An upgrade which hasn’t gone as planned One of our customer needed help after trying to upgrade their slave from Percona Server 5.6 to Percona Server 5.7. (here 5.7.17 is used) Indeed, from time to time, the replication lag was linearly growing, which could be quite annoying… (good guess, 5.7 is the red dashed line!) […]

I) Why using TokuDB? I have been playing with TokuDB since 2013. Although it’s a really good storage engine, it’s sometimes full of surprises. Initially I migrated one of my customer from InnoDB to TokuDB because it was solving all their issues : their DB has been growing to more then 1TB, and they were facing […]