thevar1able/ClickHouse
1
0
Fork 0
mirror of https://github.com/ClickHouse/ClickHouse.git synced 2024-11-22 07:31:57 +00:00
Code Issues Packages Projects Releases Wiki Activity

Update docs/en/operations/settings/memory-overcommit.md

Browse Source
This commit is contained in:
alesapin 2022-03-25 11:32:23 +01:00 committed by GitHub
parent 6470684880
commit 058b641d13
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
docs/en/operations/settings/memory-overcommit.md
View File

@ -6,7 +6,7 @@ The idea of this technique is to introduce settings which can represent guarante
When memory overcommit is enabled and the memory limit is reached ClickHouse will select the most overcommitted query and try to free memory by killing this query. When memory overcommit is enabled and the memory limit is reached ClickHouse will select the most overcommitted query and try to free memory by killing this query.
When memory limit is reached any query will wait some time during atempt to allocate new memory. When memory limit is reached any query will wait some time during atempt to allocate new memory.
If selected query is killed and memory is freed within waiting timeout, query will continue execution after waiting, otherwise it'll be killed too. If timeout is passed and memory is freed, the query continues execution. Otherwise an exception will be thrown and the query is killed.
Selection of query to stop or kill is performed by either global or user overcommit trackers depending on what memory limit is reached. Selection of query to stop or kill is performed by either global or user overcommit trackers depending on what memory limit is reached.