On 10/24/2013 03:48 PM, Karanbir Singh wrote: > On 10/23/2013 10:30 AM, Morgan Cox wrote: >> If you want SSD + MDRAID you need to use a 3.8+ kernel to have TRIM. >> >> The speed difference between the stock 2.6.32 -> 3.10 kernel with SSD + >> MDRAID is insane. > has someone quantified what this 'insane' amounts to ? Going from HDD to SSD's gave us better than a 95% reduction in query times for complex queries using PostgreSQL on otherwise identical hardware. I wouldn't have believed it had I not seen it directly, for myself.