当RDS mysql版IOPS使用率很高_mysql – 如何在AWS RDS上计算当前IOPS使用率和IOPS信用计数和图表...

最新推荐文章于 2021-10-27 09:21:15 发布

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最新推荐文章于 2021-10-27 09:21:15 发布

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文章标签：当RDS mysql版IOPS使用率很高

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本文详细介绍了I/O信用系统的工作原理。系统为每个卷提供初始I/O信用余额5.4百万次I/O操作，足以维持最大3,000 IOPS的爆发性能30分钟。此外，卷会以基准性能速率每吉字节容量3 IOPS赚取I/O信用。当需求超过基准水平时，系统将使用积累的信用以达到最高3,000 IOPS的性能。对于超过1,000吉字节的卷，其基准性能等于或高于最大爆发性能。

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Each volume receives an initial I/O credit balance of 5.4 million I/O credits, which is enough to sustain the maximum burst performance of 3,000 IOPS for 30 minutes. This initial credit balance is designed to provide a fast initial boot cycle for boot volumes and to provide a good bootstrapping experience for other applications. Volumes earn I/O credits at the baseline performance rate of 3 IOPS per GiB of volume size. For example, a 100 GiB gp2 volume has a baseline performance of 300 IOPS.

When your volume requires more than the baseline performance I/O level, it draws on I/O credits in the credit balance to burst to the required performance level, up to a maximum of 3,000 IOPS. Volumes larger than 1,000 GiB have a baseline performance that is equal or greater than the maximum burst performance, and their I/O credit balance never depletes. When your volume uses fewer I/O credits than it earns in a second, unused I/O credits are added to the I/O credit balance. The maximum I/O credit balance for a volume is equal to the initial credit balance (5.4 million I/O credits).