Top "Numa" questions

How do I know if my server has NUMA?

Hopping from Java Garbage Collection, I came across JVM settings for NUMA. Curiously I wanted to check if my CentOS …

linux jvm kernel processor numa

Poor memcpy Performance on Linux

We have recently purchased some new servers and are experiencing poor memcpy performance. The memcpy performance is 3x slower on …

c++ c linux memcpy numa

How does NUMA architecture affect the performance of ActivePivot?

We are migrating an ActivePivot application to a new server (4 sockets Intel Xeon, 512GB of memory). After deploying we launched …

java olap numa activepivot

Measuring NUMA (Non-Uniform Memory Access). No observable asymmetry. Why?

I've tried to measure the asymmetric memory access effects of NUMA, and failed. The Experiment Performed on an Intel Xeon …

c++ linux performance linux-kernel numa

numactl --physcpubind

I was using the numactl, with --physcpubind option. manual says: --physcpubind=cpus, -C cpus Only execute process on cpus. Etc... …

c linux openmp numa

starting mongodb via numactl as daemon

I'm trying to get mongodb started on a NUMA machine as a daemon. When I run numactl --interleave=all mongod &…

mongodb numa

NUMA aware cache aligned memory allocation

In linux systems, pthreads library provides us a function (posix_memalign) for cache alignment to prevent false sharing. And to …

linux caching pthreads malloc numa

Numa balancer in Linux

Is NUMA balancer enabled by default in recent Linux versions? If so how can I disable the NUMA balancer please …

linux linux-kernel numa numactl

How to confirm NUMA?

How can I confirm that a host is NUMA-aware? The Oracle doc says that NUMA-awareness starts at kernel 2.6.19, but the …

java linux numa

Mongodb in Docker: numactl --interleave=all explanation

I'm trying to create Dockerfile for in-memory MongoDB based on official repo at https://hub.docker.com/_/mongo/. In dockerfile-entrypoint.…

mongodb docker numa numactl