Re: [HACKERS] Deferred Snapshots

2011-08-23 Thread Tom Lane
Simon Riggs writes: > Back in 2009, I proposed the idea of Lazy Snapshots. > The idea was to put off generating a snapshot until we need one. It was a broken idea then, and it has not become less so with the passage of time. > However, that does not exclude a number of cases where the idea is >

[HACKERS] Deferred Snapshots

2011-08-23 Thread Simon Riggs
Back in 2009, I proposed the idea of Lazy Snapshots. The idea was to put off generating a snapshot until we need one. I have further ideas on this now. In general, this was a bad idea because... On Tue, 2009-08-18 at 10:18 -0400, Tom Lane wrote: > Simon, this concept is completely broken, as far