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--- doc:appunti:linux:sa:debian_upgrade_12_13 [2025/12/09 14:40] – [Syslog] niccolo
+++ doc:appunti:linux:sa:debian_upgrade_12_13 [2025/12/09 17:24] (current) – [Syslog] niccolo
@@ Line 46: / Line 46: @@
 </file>
-Al restart del servizio systemd-journald viene creato un opportuno punto di montaggio in **tmpfs**.
+Al restart del servizio systemd-journald viene creato la directory **/run/log/journal/** in **tmpfs**.
-Per limitare lo spazio utilizzato su memoria permanente (filesystem su disco) si possono usare diverse opzioni **%%System*%%**:
+Per limitare lo spazio utilizzato su memoria permanente (filesystem su disco) si possono usare diverse opzioni **%%System*%%**, per gestire lo spazio in memoria volatile si usano le omologhe **%%Runtime*%%**:
-^ SystemMaxUse       |  |
+^  For persistent file system  ^^
-^ SystemKeepFree     |  |
+^ SystemMaxUse        | How much disk space the journal may use up at most. Default to **10%** of the partition where ''/var/log/journal/'' resides.  |
-^ SystemMaxFileSize  |  |
+^ SystemKeepFree      | How much disk space systemd-journald shall leave free for other uses. |
-^ SystemMaxFiles     |  |
+^ SystemMaxFileSize   | How large individual journal files may grow at most before rotating.  |
+^ SystemMaxFiles      | How many individual journal files to keep at most in rotation.  |
+^  For volatile in-memory file system  ^^
+^ RuntimeMaxUse       | In Debian, the default ''/run/log/journal/'', resides into the ''/run'' tempfs.  |
+^ RuntimeKeepFree     |  |
+^ RuntimeMaxFileSize  |  |
+^ RuntimeMaxFiles     |  |
+^  Rotation  ^^
+^ MaxFileSec          | The maximum time to store entries in a single journal file before rotating to the next one. Use it to ensure that not too much data is lost at once when old journal files are deleted.  |
+^ MaxRetentionSec     | The maximum time to store journal entries. If you need a retention shorter than the one imposed by SystemMaxUse.  |
+This is an example on how to limit the disk space used and to determine rotaton policy (rotate once a day, keep 366 files i.e. one year):
+<file>
+[Journal]
+SystemMaxUse=7G
+SystemKeepFree=2G
+SystemMaxFileSize=256M
+SystemMaxFiles=366
+MaxFileSec=1day
+</file>
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