Your message dated Sun, 26 Oct 2025 10:49:28 +0000
with message-id <[email protected]>
and subject line Bug#1039449: fixed in fluidsynth 2.5.0+dfsg-1
has caused the Debian Bug report #1039449,
regarding fluidsynth: High memory usage even if not used
to be marked as done.
This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
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1039449: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1039449
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
Package: fluidsynth
Version: 2.3.1-2
Severity: normal
X-Debbugs-Cc: [email protected]
fluidsynth auto-starts on my system when I log in, and that causes it to
read into memory /usr/share/sounds/sf3/default-GM.sf3 (this is a symlink
to /etc/alternatives/default-GM.sf3 which is a symlink to
/usr/share/sounds/sf2/FluidR3_GM.sf2).
About 142 megabytes of it.
-rw-r--r-- 1 root root 142M Feb 24 2008 /usr/share/sounds/sf2/FluidR3_GM.sf2
This causes fluidsynth RSS to use about 165MB of residewnt memory, even
if it is not used for anything.
I do not know why it autostarts, my guess is that pipewire or something
else starts it, even if it is not needed. (it runs as a normal user, not
some system user, and there are no init.d script or systemd units for it
that I can find)
Memory usage, looks to correspond to this memory mapping.
Output of pmap -p $(pidof fluidsynth)
00007fdea2389000 144724K rw--- [ anon ]
But there is also many 8M mappings, but they do not contribute to RSS (mapped,
but not touched).
If I show more info with pmap, I got:
3848: /usr/bin/fluidsynth -is /usr/share/sounds/sf3/default-GM.sf3
Address Perm Offset Device Inode Size Rss Pss Pss_Dirty
Referenced Anonymous LazyFree ShmemPmdMapped FilePmdMapped Shared_Hugetlb
Private_Hugetlb Swap SwapPss Locked THPeligible Mapping
...
7fdea2389000 rw-p 00000000 00:00 0 144724 144724 144724 144724
144724 144724 0 0 0 0
0 0 0 144724 1
...
Not only it is fully read, it is mlock-ed (probably to ensure it is not
swapped out, which is important for audio application like this).
It would be desirable in situation like this, to not load whole sf file
by default (just read basic metadata of it), and delay loading, until
there is actually a need for it. Alternatively have them in a format on
disk, that can be mmaped directly. Proper behaviour could be controlled
by some command line flags.
Regards,
Witold
--- End Message ---
--- Begin Message ---
Source: fluidsynth
Source-Version: 2.5.0+dfsg-1
Done: Fabian Greffrath <[email protected]>
We believe that the bug you reported is fixed in the latest version of
fluidsynth, which is due to be installed in the Debian FTP archive.
A summary of the changes between this version and the previous one is
attached.
Thank you for reporting the bug, which will now be closed. If you
have further comments please address them to [email protected],
and the maintainer will reopen the bug report if appropriate.
Debian distribution maintenance software
pp.
Fabian Greffrath <[email protected]> (supplier of updated fluidsynth package)
(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing [email protected])
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512
Format: 1.8
Date: Sun, 26 Oct 2025 11:25:47 +0100
Source: fluidsynth
Architecture: source
Version: 2.5.0+dfsg-1
Distribution: experimental
Urgency: medium
Maintainer: Debian Multimedia Maintainers <[email protected]>
Changed-By: Fabian Greffrath <[email protected]>
Closes: 1039449
Changes:
fluidsynth (2.5.0+dfsg-1) experimental; urgency=medium
.
* Upload to experimental, until the symbol visibility issue is fixed
upstream (https://github.com/FluidSynth/fluidsynth/issues/1676)
.
* New upstream version 2.5.0+dfsg
* Build fluidsynth without GLib
* Enable dynamic sample loading for the daemon to reduce its memory
footprint (Closes: #1039449)
* Do not export dpkg buildflags and buildtools anymore
* Add Build-Depends on libgcem-dev
* Fix old-fsf-address-in-copyright-file
* Remove redundant RRR: no
* Bump Standards-Version to 4.7.2
* Update debian/watch to version 5
* Move symbols control file out of the way,
call `dh_makeshlibs -VUpstream-Version`
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