On Fri, May 17, 2019 at 9:42 AM Thomas Munro wrote:
> pgbench -M prepared read-only transactions per second, 16 client threads:
(That second "16 client threads" line should read "32 client threads".)
--
Thomas Munro
https://enterprisedb.com
On Fri, May 17, 2019 at 5:26 AM Chapman Flack wrote:
> On 5/16/19 12:24 PM, Albert Cervera i Areny wrote:
> > Missatge de Thomas Munro del dia dj., 16 de
> > maig 2019 a les 13:09:
> >> With all three mitigations activated, my little dev machine has gone
> >> from being able to do ~11.8 million b
On 5/16/19 12:24 PM, Albert Cervera i Areny wrote:
> Missatge de Thomas Munro del dia dj., 16 de
> maig 2019 a les 13:09:
>> With all three mitigations activated, my little dev machine has gone
>> from being able to do ~11.8 million baseline syscalls per second to
>
> Did you mean "1.8"?
Not in
Missatge de Thomas Munro del dia dj., 16 de
maig 2019 a les 13:09:
>
> On Wed, May 15, 2019 at 1:13 PM Andres Freund wrote:
> > > I've run a quick pgbench benchmark:
> > >
> > > *Without* disabling SMT, for readonly pgbench, I'm seeing regressions
> > > between 7-11%, depending on the size of sha
On Wed, May 15, 2019 at 1:13 PM Andres Freund wrote:
> > I've run a quick pgbench benchmark:
> >
> > *Without* disabling SMT, for readonly pgbench, I'm seeing regressions
> > between 7-11%, depending on the size of shared_buffers (and some runtime
> > variations). That's just on my laptop, with a
Hi,
On 2019-05-14 15:30:52 -0700, Andres Freund wrote:
> There's a new set of CPU vulnerabilities, so far only affecting intel
> CPUs. Cribbing from the linux-kernel announcement I'm referring to
> https://xenbits.xen.org/xsa/advisory-297.html
> for details.
>
> The "fix" is for the OS to perform
Hi,
On 2019-05-15 12:52:47 +1200, Thomas Munro wrote:
> On Wed, May 15, 2019 at 10:31 AM Andres Freund wrote:
> > *Without* disabling SMT, for readonly pgbench, I'm seeing regressions
> > between 7-11%, depending on the size of shared_buffers (and some runtime
> > variations). That's just on my
On Wed, May 15, 2019 at 10:31 AM Andres Freund wrote:
> *Without* disabling SMT, for readonly pgbench, I'm seeing regressions
> between 7-11%, depending on the size of shared_buffers (and some runtime
> variations). That's just on my laptop, with an i7-6820HQ / Haswell CPU.
> I'd be surprised if
Hi,
There's a new set of CPU vulnerabilities, so far only affecting intel
CPUs. Cribbing from the linux-kernel announcement I'm referring to
https://xenbits.xen.org/xsa/advisory-297.html
for details.
The "fix" is for the OS to perform some extra mitigations:
https://www.kernel.org/doc/html/latest
