Hi, I've got cutomer with really huge RAM, now it's: total used free shared buffers cached Mem: 3102111 3052596 49515 208801 992 2961185 -/+ buffers/cache: 90418 3011693 Swap: 8191 1 8190 (free -m) and before it was twice more (6TB). and trying to figure out how to set dirty_ratio & dirty_background_ratio parameters. Even for normal sized server those default sizes are to high, but now would be ridiculously huge, respectively 1,24TB and 300GB. I'm thinking about 1 percent for dirty_ratio and not using dirty_background_ratio because it's not possible to set it below 1% but to set dirty_background_bytes instead to about 1-2GB. Maybe someone has got other experience with RAM of this size and those settings? -- Sent from: http://www.postgresql-archive.org/PostgreSQL-general-f1843780.html