Patch journald to use less disk per user?

[adehnert]

journald creates and grows journal files in 8MB chunks. Since each user gets a separate journal, this means that we have users*8MB, or (apparently) around 24GB of journals, only about a third of it used. Perhaps we should reduce the chunk size to, say, 4MB. Unfortunately, this isn't configurable, but it looks like a straightforward patch (just change ​FILE_SIZE_INCREASE), if we don't mind building our own journald.