Re: [HACKERS] Buffer Allocation Concurrency Limits

2014-04-08 Thread Amit Kapila
On Tue, Apr 8, 2014 at 10:38 PM, Jason Petersen wrote: > In December, Metin (a coworker of mine) discussed an inability to scale a > simple task (parallel scans of many independent tables) to many cores (it's > here). As a ramp-up task at Citus I was tasked to figure out what the heck > was going

[HACKERS] Buffer Allocation Concurrency Limits

2014-04-08 Thread Jason Petersen
In December, Metin (a coworker of mine) discussed an inability to scale a simple task (parallel scans of many independent tables) to many cores (it’s here). As a ramp-up task at Citus I was tasked to figure out what the heck was going on here. I have a pretty extensive writeup here (whose lengt