For your information, interesting stats as of today:
MariaDB [mastodon]> select count(*) from instances;
| 6194 |
select count(*) from instances where isdown=1;
| 2070 |
select count(*) from accounts;
| 245570 |
select count(*) from accounts where noindex=1;
| 17680 |
76165219 statuses, amongst them 162303 has been marked "deleted"