Hi Ronan, We briefly chatted about the glibc-tuning part of this thread at pgcon, so I wonder if you're still planning to pursue that. If you do, I suggest we start a fresh thread, so that it's not mixed with the already committed improvements of generation context.
I wonder what's the situation with the generation context improvements already pushed - does setting the glibc thresholds still help, and if yes how much? regards -- Tomas Vondra EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company