[#MDEV-8266] Page compressed doesn't work

I want to try the page compressed, but I can't see the effect.
This is my steps.

MariaDB [test]> set global innodb_file_format=Barracuda;

Query OK, 0 rows affected (0.00 sec)

MariaDB [test]> set global innodb_compression_algorithm=zlib;

Query OK, 0 rows affected (0.00 sec)

I create a table to test the page compressed.

MariaDB [test]> CREATE TABLE `T1` ( `a` int(11) DEFAULT NULL ) engine=innodb page_compressed=1;

Query OK, 0 rows affected (0.01 sec)

And I check the variables and status.

MariaDB [test]> show variables like '%compress%';

+-------------------------------------------+-------+

| Variable_name                             | Value |

+-------------------------------------------+-------+

| have_compress                             | YES   |

| innodb_background_scrub_data_compressed   | OFF   |

| innodb_background_scrub_data_uncompressed | OFF   |

| innodb_compression_algorithm              | zlib  |

| innodb_compression_failure_threshold_pct  | 5     |

| innodb_compression_level                  | 6     |

| innodb_compression_pad_pct_max            | 50    |

| innodb_immediate_scrub_data_uncompressed  | OFF   |

| innodb_log_compressed_pages               | OFF   |

| slave_compressed_protocol                 | OFF   |

+-------------------------------------------+-------+

MariaDB [test]> SHOW STATUS LIKE '%compress%';

+------------------------------------------+-------+

| Variable_name                            | Value |

+------------------------------------------+-------+

| Compression                              | OFF   |

| Innodb_page_compression_saved            | 0     |

| Innodb_page_compression_trim_sect512     | 0     |

| Innodb_page_compression_trim_sect1024    | 0     |

| Innodb_page_compression_trim_sect2048    | 0     |

| Innodb_page_compression_trim_sect4096    | 0     |

| Innodb_page_compression_trim_sect8192    | 0     |

| Innodb_page_compression_trim_sect16384   | 0     |

| Innodb_page_compression_trim_sect32768   | 0     |

| Innodb_num_pages_page_compressed         | 0     |

| Innodb_num_page_compressed_trim_op       | 0     |

| Innodb_num_page_compressed_trim_op_saved | 0     |

| Innodb_num_pages_page_decompressed       | 0     |

| Innodb_num_pages_page_compression_error  | 0     |

| Innodb_defragment_compression_failures   | 0     |

+------------------------------------------+-------+

MariaDB [test]> SELECT * FROM INFORMATION_SCHEMA.INNODB_SYS_TABLESPACES;

+-------+-------------+------+-------------+------------+-----------+---------------+

| SPACE | NAME        | FLAG | FILE_FORMAT | ROW_FORMAT | PAGE_SIZE | ZIP_PAGE_SIZE |

+-------+-------------+------+-------------+------------+-----------+---------------+

|   145 | test/T1     |  865 | Barracuda   | Dynamic    |     16384 |             0 |

+-------+-------------+------+-------------+------------+-----------+---------------+

Then I insert 100MB data into T1 and check the status again.

MariaDB [test]> SHOW STATUS LIKE '%compress%';

+------------------------------------------+-------+

| Variable_name                            | Value |

+------------------------------------------+-------+

| Compression                              | OFF   |

| Innodb_page_compression_saved            | 0     |

| Innodb_page_compression_trim_sect512     | 0     |

| Innodb_page_compression_trim_sect1024    | 0     |

| Innodb_page_compression_trim_sect2048    | 0     |

| Innodb_page_compression_trim_sect4096    | 0     |

| Innodb_page_compression_trim_sect8192    | 0     |

| Innodb_page_compression_trim_sect16384   | 0     |

| Innodb_page_compression_trim_sect32768   | 0     |

| Innodb_num_pages_page_compressed         | 0     |

| Innodb_num_page_compressed_trim_op       | 0     |

| Innodb_num_page_compressed_trim_op_saved | 0     |

| Innodb_num_pages_page_decompressed       | 0     |

| Innodb_num_pages_page_compression_error  | 0     |

| Innodb_defragment_compression_failures   | 0     |

+------------------------------------------+-------+

Why all the status still 0?
I see the status of Compression is OFF.
My step is it correct or not ?

[MDEV-8266] Page compressed doesn't work Created: 2015-06-04 Updated: 2015-06-04 Resolved: 2015-06-04
Status:	Closed
Project:	MariaDB Server
Component/s:	Storage Engine - InnoDB, Storage Engine - XtraDB
Affects Version/s:	10.1.4
Fix Version/s:	N/A