syschunks 视图现在有一个名为 ‘is_extendable’ 的附加列，指示块是否可扩展。
The sysmaster:syschunks view now has an additional column called 'is_extendable' to indicate whether the chunk is extendable or not.
如果应用程序负载不足—即它没有足够的工作可做—，则GC的速率不可作为良好的性能指示器，因为如果没有工作可做，速率将会下降。
If an application is under-loaded - that is, if it doesn't have enough work to do - the rate of GC is not a great performance indicator because the rate will drop if no work is coming in.
举例来说，EPMO 可以配置，然后“忽略”那些指示计划已经超越某些维度上可允许的边界的警报。
Alarms and alerts, for example, which indicate that an initiative has exceeded allowable boundaries in some dimension, can be configured and then "forgotten" by the EPMO.
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