[jira] [Updated] (IGNITE-5382) SQL: frequent switch between schemas cause severe slowdown

["Vladimir Ozerov (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IGNITE-5382?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Vladimir Ozerov updated IGNITE-5382:
------------------------------------
    Labels: important performance sql-performance  (was: important performance)

> SQL: frequent switch between schemas cause severe slowdown
> ----------------------------------------------------------
>
>                 Key: IGNITE-5382
>                 URL: https://issues.apache.org/jira/browse/IGNITE-5382
>             Project: Ignite
>          Issue Type: Task
>          Components: cache, sql
>            Reporter: Vladimir Ozerov
>            Assignee: Sergey Kalashnikov
>            Priority: Major
>              Labels: important, performance, sql-performance
>
> We have thread-bound cached connection to H2 database which is bound to specific schema. See {{IgniteH2Indexing.connectionForThread}}.
> When query with different schema is executed, we call {{SET SCHEMA}} command, which is rather expensive and may cause slowdown when queries form different caches are executed.
> To avoid this we should maintain thread-local map of such connections. Be careful with concurrency and resource leaks.



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)