Jan Kara <jack@xxxxxxx> writes: > Hi Jeff, > > On Tue 09-10-18 15:43:41, Jeff Moyer wrote: >> I'm intrigued by the use case. Do I understand you correctly that the >> database in question does not intend to make data persistent from >> userspace? In other words, fsync/msync system calls are being issued by >> the database? > > Yes, at least at the initial stage, they use fsync / msync to persist data. OK. >> I guess what I'm really after is a statement of requirements or >> expectations. It would be great if you could convince the database >> developer to engage in this discussion directly. > > So I talked to them and what they really look after is the control over the > amount of memory needed by the kernel. And they are right that if your > storage needs page cache, the amount of memory you need to set aside for the > kernel is larger. OK, thanks a lot for following up, Jan! -Jeff
