[
https://issues.apache.org/jira/browse/IGNITE-16315?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Aleksey Plekhanov updated IGNITE-16315:
---------------------------------------
Description: For simple queries SQL engine most of the time spend in
writing/reading query start requests, which contains a lot of data. Nested
instances of {{ColocationGroup}} class contain assignments for each partition
(\{{List<List<UUID>>}}). Transferred size can be reduced if we compact
assignments somehow. Also, the target colocation group from fragment
description contains redundant synthetic partitions, this also can be
optimized. (was: For simple queries SQL engine most of the time spend in
writing/reading query start requests, which contains a lot of data.
{{FragmentDescription}} class stores in communication message
{{ColocationGroup}} type (\{{target}} field), which contains cache partition
assignments (for each partition of the cache, 1024 items by default, list of
node IDs are stored). After it, {{ColocationGroup}} is stored again in
{{FragmentMapping}} class.
We need to investigate this behaviour and optimize it if possible.)
> Calcite engine. Query start request contains a lot of data
> ----------------------------------------------------------
>
> Key: IGNITE-16315
> URL: https://issues.apache.org/jira/browse/IGNITE-16315
> Project: Ignite
> Issue Type: Improvement
> Reporter: Aleksey Plekhanov
> Assignee: Aleksey Plekhanov
> Priority: Major
> Labels: calcite2-required, calcite3-required
> Time Spent: 10m
> Remaining Estimate: 0h
>
> For simple queries SQL engine most of the time spend in writing/reading query
> start requests, which contains a lot of data. Nested instances of
> {{ColocationGroup}} class contain assignments for each partition
> (\{{List<List<UUID>>}}). Transferred size can be reduced if we compact
> assignments somehow. Also, the target colocation group from fragment
> description contains redundant synthetic partitions, this also can be
> optimized.
--
This message was sent by Atlassian Jira
(v8.20.1#820001)
