Hi,
Currently, Haihang and Yuan Tian added an improvement to fetch the results of show timeseries iteratively to avoid OOM [1]. For data queries, we use the QueryDataSet which provides the hasNext & next iterator. Then the client could fetch result by fetchSize. However, for most metadata queries, the ListDataSet is used, which caches all results at server. This may cause OOM. "show timeseries" query is just one case whose results may be very large and use the ListDataSet. We'd better check other metadata queries, and when you add a new query type, please consider its memory consumption. [1] https://github.com/apache/incubator-iotdb/pull/1470 Thanks, -- Jialin Qiao School of Software, Tsinghua University 乔嘉林 清华大学 软件学院
