Tagged articles

moveChunk

2 articles · Page 1 of 1

Jun 16, 2020 · Databases

Why MongoDB 4.0 Increases CPU Load After Upgrade – Balancer and moveChunk Explained

After upgrading a three‑shard MongoDB cluster from version 3.2 to 4.0, CPU usage jumped from 10 % to 40 % due to more frequent moveChunk operations and the resulting delete workload, as the balancer’s imbalance thresholds changed between versions.

BalancerMongoDBPerformance

0 likes · 14 min read

Why MongoDB 4.0 Increases CPU Load After Upgrade – Balancer and moveChunk Explained

NetEase Game Operations Platform

Mar 28, 2020 · Databases

Analysis of MongoDB 3.2 vs 4.0 Balancer and moveChunk Impact on CPU Load

The article examines why upgrading a three‑shard MongoDB cluster from version 3.2 to 4.0 causes CPU usage to jump from 10 % to 40 %, attributing the increase to more frequent moveChunk operations and the associated deletion workload, and explains the underlying balancer threshold differences between the versions.

BalancerCPU loadDatabases

0 likes · 13 min read

Analysis of MongoDB 3.2 vs 4.0 Balancer and moveChunk Impact on CPU Load