I noticed that dnf update stuck for a while in the "Cleanup" phase of the breeze-icon-theme package.

At the time this was taken: it spent 10 minutes with the CPU pegged at 100%, and it eventually finished at about the 11 and a half minute mark, and completed the rest of the update:

Tasks: 330 total,   2 running, 324 sleeping,   0 stopped,   4 zombie
%Cpu(s):  8.8 us,  3.6 sy,  0.0 ni, 87.4 id,  0.0 wa,  0.1 hi,  0.0 si,  0.0 st
MiB Mem :  16002.0 total,   4592.0 free,   1188.6 used,  10221.4 buff/cache
MiB Swap:   1024.0 total,    966.4 free,     57.6 used.  14398.6 avail Mem

   PID USER      PR  NI    VIRT    RES    SHR S  %CPU  %MEM     TIME+ COMMAND
185190 root      20   0  563752 217788  31884 R  98.7   1.3  10:40.80 dnf


strace was showing that this was reading and writing to /var/lib/rpm/rpmdb.sqlite-wal which, here, is about 240mb in size. /var/lib/rpm/rpmdb.sqlite was 256mb (there's a lot of junk on this box due to its history).

rpm --rebuilddb removed rpmdb.sqlite-wal, and shrunk rpmdb.qlite to 128mb.

The breeze-icon-theme package installs 17513 files. I guess I'll have to wait until this package gets another update and see if the issue is with rpm grinding down on such a large package, or sqlite dbs accumulating cruft over time.

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