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Errors fixed: 1. Instances may become inaccessible when you query data with no tags specified or with too many metrics specified. 2. The max field in the api/demp_meta path does not take effect. These errors are fixed so that you can query time series indexes more efficiently. Time Series Database (TSDB) is a database service that provides real-time monitoring, multidimensional random analysis, and data visualization capabilities for the IoT, IIoT, and Internet industries. It reads and writes a large volume of data, stores compressed data, and provides analysis functions. This helps you detect business exceptions, learn about business status, and improve the performance. For more information, see https://www.aliyun.com/product/hitsdb?spm=5176.8142029.cloudEssentials.41.e9396d3eCjI1nX.