Percona XtraDB Cluster 5.7 的效能改善

在「Percona XtraDB Cluster 5.7.17-29.20 is now available」這邊提到了:

This release is focused on performance and scalability with increasing workload threads. Tests show up to 10 times increase in performance.

不過這邊沒提到是 MySQL 本身還是 Galera Cluster 實做的修正,或是 PXC 本身特有的 bug 被修正... (通常都是有 bug 造成效能很慢,然後修正後拉上來)

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