shivakumar created IGNITE-12152:
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Summary: Disk space not getting released after deleting rows from
a table or after records expired with expiration policy
Key: IGNITE-12152
URL: https://issues.apache.org/jira/browse/IGNITE-12152
Project: Ignite
Issue Type: Bug
Components: documentation, persistence, sql
Affects Versions: 2.7
Reporter: shivakumar
To reproduce,
create a cache group and create a sql table using that cache group, then insert
considerable rows of records to the table, monitor the disk space usage, now
stop inserting records and delete records from the table using
*DELETE FROM table; (not a drop table operation)*
once this is done the *select count(*) from table;* shows the count 0 but after
this when disk space is monitored it will be in the same usage level as it is
in the level before rows deletion.
When I start inserting records again, the new records re-used the space
occupied by the deleted records but still, it is not a good idea to
unnecessarily hold disk resource.
The same can be reproduced by configuring cache expiry policy
(CreatedExpiryPolicy) where after records expires it will not be visible in sql
query (select * from table) but still it will hold disk resource.
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