O que significam as mensagens “Aspirar feito, liberar 0 bytes”?

Question

Estou vendo mensagens como as seguintes no meu diário do sistema:

systemd-journald[52]: Vacuuming done, freed 0 bytes
systemd-journald[52]: Vacuuming done, freed 0 bytes
systemd-journald[52]: Vacuuming done, freed 0 bytes
systemd-journald[52]: Vacuuming done, freed 4198400 bytes
systemd-journald[52]: Vacuuming done, freed 4198400 bytes
systemd-journald[52]: Vacuuming done, freed 4198400 bytes
systemd-journald[52]: Vacuuming done, freed 4198400 bytes
systemd-journald[52]: Vacuuming done, freed 4198400 bytes

O que essas mensagens significam?

    

Answer 1

Bem, é mais um log do journald do que um log do systemd, aqui está o que o journalctl diz sobre o tamanho do vácuo:

journalctl(1) wrote: --vacuum-size=, --vacuum-time= Removes archived journal files until the disk space they use falls below the specified size (specified with the usual "K", "M", "G", "T" suffixes), or all journal files contain no data older than the specified timespan (specified with the usual "s", "min", "h", "days", "months", "weeks", "years" suffixes). Note that running --vacuum-size= has only indirect effect on the output shown by --disk-usage as the latter includes active journal files, while the former only operates on archived journal files. --vacuum-size= and --vacuum-time= may be combined in a single invocation to enforce both a size and time limit on the archived journal files.