mariadb: use pxz with 2 threads for backups

This has anoyingly been alerting of late, so lets try and
see if we can get the backup to finish faster and avoid the
alerts on it.

Signed-off-by: Kevin Fenzi <kevin@scrye.com>

roles/mariadb_server/files/backup-database

@@ -4,7 +4,7 @@
 DB=$1
 
 # Make our latest backup
-ionice -c3 /bin/mysqldump --user=root --add-drop-database $DB | /usr/bin/xz > /backups/$DB-$(date +%F).dump.xz
+ionice -c3 /bin/mysqldump --user=root --add-drop-database $DB | /usr/bin/pxz -T2 > /backups/$DB-$(date +%F).dump.xz
 
 # link to the latest backup
 ln -sf /backups/$DB-$(date +%F).dump.xz /backups/$DB-latest.xz

roles/mariadb_server/tasks/main.yml

@@ -4,6 +4,7 @@
     state: present
     name:
     - mariadb-server
+    - pxz
   when: ansible_cmdline.ostree is not defined
 
 - name: Ensure packages required for mariadb are installed (el8)