Subject RE: [firebird-support] Readcomitted ReadOnly Transaction - Commit or Rollback?
Author Ralf Jansen
>I'm confused. I thought that read-only read-committed transactions did not consume transaction ids.

I can’t elaborate on the details why but I can confirm they do get the transaction counters moving.
And Dmitrys explanation regarding the writing of TIP Pages fit the count of writes done on my NAS if I assume 2 (or 3) writes of the TIP Page per Transaction besides the Header Page.