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Percona Blog1 Hot0 comments7 min read
When a Small Change Writes Too Much – How A Linux Kernel Improvement Can Strike You in PXC/Galera Workloads
AI summary
Một cải tiến trong Linux kernel từ phiên bản 4.19 đã gây ra hiện tượng ghi đĩa bất ngờ trong các hệ thống sử dụng PXC/Galera. Nguyên nhân kỹ thuật nằm ở việc kernel optimization cho writeback của page cache, khiến việc commit transaction trong Galera cluster tạo ra các burst write lớn hơn dự kiến. Hệ quả là I/O đột ngột làm giảm hiệu suất đáng kể, đặc biệt với các workload có nhiều write operation. Các nhà phát triển nên chú ý đến tác động của kernel version upgrade lên database cluster, và xem xét cách điều chỉnh writeback parameters để giảm thiểu impact.
AI summaries can be wrong. Read the original before relying on anything important.
Why read it: Bài này giúp bạn hiểu được cách một cải tiến trong Linux kernel có thể gây ra các đợt ghi đĩa bất ngờ trong PXC/Galera.
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Source: https://www.percona.com/blog/when-a-small-change-writes-too-much-how-a-linux-kernel-improvement-can-strike-you-in-pxc-galera-workloads. 8 Sync News only summarizes and links out; content copyright belongs to the authors and original sources.
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