We are looking to test if Percona might work for a VERY intense read pressure application that constantly fetches data from a MongoDB source with only about 2GB of backing data, BUT it also does many pipeline aggregations to structure the data returned that requires the “allowDiskUse” flag to be true for our MongoDB version of the database. The hope is that the “disk use” for the aggregation is also done in memory provided that the size is sufficient.
Has there been any experience using this flag and the In-Memory Percona Engine?