When a query is executed using the HTTP end-point the response has a number of headers applied that can be used later.
HTTP/2 200 date: Tue, 29 Jun 2021 09:32:06 GMT content-type: application/json; charset=UTF-8 x-clickhouse-query-id: c4f6aba2-480f-4f67-9d5d-5662e44b45dc x-clickhouse-format: JSON x-clickhouse-timezone: UTC x-hdx-query-stats: exec_time=4271 rows_read=0 bytes_read=0 num_partitions=4 num_peers=2 traceparent: 00-9e94d8306114a074da5393950ff481ac-cace2fb519dc02bb-01
|Unique query identifier, supplied each time a query is executed.|
|The format of the response Body.|
|The time zone applied to the data.|
|Statistics and information covering how the query was executed and by how many resources|
|The traceId that can be used to look up the query trace within Tempo|
The Query stats supply the following information.
|Execution time of the query in milliseconds|
|Number of rows read to supply to answer the query|
|Number of uncompressed bytes parsed to answer the query|
|Number of HDX partitions accessed to answer the query|
|Number of query-peers accessed to answer the query|
Updated about 1 month ago