[GitHub] [iotdb] PaulFungcn opened a new issue #5321: 历史数据导入会导致IoTDB查询变慢

[GitBox <gi...@apache.org>]

PaulFungcn opened a new issue #5321:
URL: https://github.com/apache/iotdb/issues/5321


   当进行大量的历史数据导入时（TB级），IoTDB会出现明显的查询变慢问题，同时CPU的使用率明显上升。以目前我们的使用场景为例，导入80000个测点两年以上的历史数据，数据量大概在7-8TB。导入前，IoTDB中测点最新值查询耗时在10ms以下，在导入历史数据的过程中发现：同样的最新值查询竟花费了9秒，对应用的数据查询体验造成了较大影响。希望IoTDB团队优化历史数据导入处理流程，降低对查询的影响。此外，希望能给出历史数据导入过程的制约因素，指导用户进行数据库参数配置或者硬件资源的升级。
   


-- 
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.

To unsubscribe, e-mail: reviews-unsubscribe@iotdb.apache.org

For queries about this service, please contact Infrastructure at:
users@infra.apache.org

[GitHub] [iotdb] PaulFungcn commented on issue #5321: 历史数据导入会导致IoTDB查询变慢

[GitBox <gi...@apache.org>]

PaulFungcn commented on issue #5321:
URL: https://github.com/apache/iotdb/issues/5321#issuecomment-1085300000


   导入过程和导入完成后都会变慢


-- 
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.

To unsubscribe, e-mail: reviews-unsubscribe@iotdb.apache.org

For queries about this service, please contact Infrastructure at:
users@infra.apache.org

[GitHub] [iotdb] jixuan1989 commented on issue #5321: 历史数据导入会导致IoTDB查询变慢

[GitBox <gi...@apache.org>]

jixuan1989 commented on issue #5321:
URL: https://github.com/apache/iotdb/issues/5321#issuecomment-1076282925


   是导入过程中变慢，还是导入完成后依然慢？


-- 
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.

To unsubscribe, e-mail: reviews-unsubscribe@iotdb.apache.org

For queries about this service, please contact Infrastructure at:
users@infra.apache.org