If update conflicts are likely, then the performance overhead of retries can be very costly.
如果可能出现更新冲突，则重试的性能开销将非常大。
The most important design issue for hosting fast-update historical data is the performance.
存储快更新历史数据最重要的设计问题就是性能。
EDIT2: You can already download the new update to fix the performance issues.
按2：你已经可以下载新的更新来解决性能问题。
Involve in performance evaluation policy design, implementation and update.
参与绩效激励政策的制定，实施和更新。
Involve in performance evaluation policy design, implementation and update.
参与绩效激励政策的制定，实施和更新。
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