Hi,
Lock contention observed high in PostgreSQLv13.3
The source code compiled with GNC(GCCv11.x)
PostgreSQL version: 13.3
Operating system: RHEL8.3
Kernel name:4.18.0-305.10.2.el8_4.x86_64
RAM Size:512GB
SSD: 1TB
The environment used IBM metal and test benchmark environment HammerDbv4.2
Test case
Tuesday, October 12, 2021, Laurenz Albe wrote:
> On Tue, 2021-10-12 at 13:05 +0530, Ashkil Dighin wrote:
> > Perf data for 24vu(TPC-C)
> >
> >
> > 18.99% postgres postgres[.] LWLockAcquire
> &g
ss to remote memory and
> speed up processing.
>
> Thanks,
> Michael.
>
> On 10/12/21 10:35 AM, Ashkil Dighin wrote:
>
>
> Hi,
> Lock contention observed high in PostgreSQLv13.3
> The source code compiled with GNC(GCCv11.x)
> PostgreSQL version: 13.3
> Operating syst
Not using PostGIS
On Thursday, October 14, 2021, Paul Friedman <
paul.fried...@streetlightdata.com> wrote:
> Are you using PostGIS?
>
> If so, there is an issue with TOAST table locking having these symptoms.
>
>
> ---Paul
>
>
> On Wed, Oct 13, 2021 at 11:15 AM MichaelDBA
> wrote:
>
>> 1.Is ther
e-and-scalability/
On Thursday, October 14, 2021, Peter Geoghegan wrote:
> On Tue, Oct 12, 2021 at 12:45 AM Ashkil Dighin
> wrote:
> > Lock contention observed high in PostgreSQLv13.3
> > The source code compiled with GNC(GCCv11.x)
> > PostgreSQL version: 13.3
> > Operatin
“WalInsert”
On Tuesday, October 26, 2021, Andres Freund wrote:
> Hi,
>
> On 2021-10-12 13:05:12 +0530, Ashkil Dighin wrote:
> > PostgreSQL version: 13.3
>
> You could try postgres 14 - that did improve scalability in some areas.
>
>
>
wrote:
> Hi,
>
> On October 27, 2021 2:44:56 PM PDT, Ashkil Dighin <
> ashkildighi...@gmail.com> wrote:
> >Hi,
> >Yes, lock contention reduced with postgresqlv14.
> >Lock acquire reduced 18% to 10%
> >10.49 %postgres postgres[.]
Hi
The performance bottleneck in LWLockRelease()method goes through an array
one by one to see which lock was released with O(N). As soon as the lock is
found it performs an array to remove the lock.
As linear search and compaction delays the release of the lock forcing the
other Postgres instances
