pt-mysql-summary displays incorrect info about Fast Server Restarts for Percona Server 5.6

[Yevgen Yaremenko]

pt-mysql-summary displays incorrect info about Fast Server Restarts:

> pt-mysql-summary | grep "Fast Server Restarts"
     Fast Server Restarts | Not Supported

mysql> show global variables like "innodb_buffer_pool_load_at_startup";
+------------------------------------+-------+
| Variable_name | Value |
+------------------------------------+-------+
| innodb_buffer_pool_load_at_startup | ON |
+------------------------------------+-------+
1 row in set (0.00 sec)

According to the https://www.percona.com/doc/percona-server/5.6/changed_in_56.html innodb_buffer_pool_restore_at_startup was replaced by innodb_buffer_pool_load_at_startup.

Tool version: 2.2.16
MySQL version: Percona server 5.6+

Patch is attached. After the patch applying the output is the following:

> ./pt-mysql-summary | grep "Fast Server Restarts"
     Fast Server Restarts | Enabled

[Shahriyar Rzayev (rzayev-sehriyar)]

Percona now uses JIRA for bug reports so this bug report is migrated to: https://jira.percona.com/browse/PT-699