On Tue, 25 Sep 2018 at 18:36, Sam R. wrote:
> Regarding double buffering: I do not know how much double buffering would
> slow down operations.
> It could also be possible to turn off kernel page cache on our DB server, to
> avoid double buffering. Although, we may still keep it in use.
I think
> 1) Which file system are you using?
>From Linux's view it's ext4. Real vmdx file on Hyper-V is stored on NTFS,
as far as I know.
> 2) What is the segment layout of the LVM PVs and LVs?
I am a bit lost with it. Is that what you are asking about?
master:
# pvs --segments
PV VGFmt
On 2018-Sep-25, Justin Pryzby wrote:
> I asked few weeks ago [0] but didn't get a response on -docs so resending here
> for wider review/discussion/.
I support the idea of adding a link to "Performance Optimization".
That's not a protected page, so you should be able to do it.
> [0]
> https://
I asked few weeks ago [0] but didn't get a response on -docs so resending here
for wider review/discussion/.
[0]
https://www.postgresql.org/message-id/flat/20180908012957.GA15350%40telsasoft.com
On Fri, Sep 07, 2018 at 08:29:57PM -0500, Justin Pryzby wrote:
> Hi,
>
> I'm suggesting to link to:
On 25/09/18 00:28, Vladimir Ryabtsev wrote:
>
> > it is not unusual to have 1GB cache or more... and do not forget to drop
> > the cache between tests + do a sync
> I conducted several long runs of dd, so I am sure that this numbers are
> fairly correct. However, what worries me is that I test
