Large historical tables and autovacuum

[David Morton <davidmorton78@xxxxxxxxx>]

We have many large tables which contain static historical data, they are auto vacuumed on a regular basis (sometimes to prevent wraparound) which i suspect causes a few annoying side effects:

- Additional WAL file generation

- Increased 'changed' data as far as our online rsync based backups are concerned

Is there any way to tell Postgres that these tables are now not available for changes so we can avoid these seemingly pointless maintenance tasks ?

Dave