I have also changed these values in mpd.conf and it seems to be working fine now. It is still scanning and will be busy for a while as I have over 275K tracks to import, will post an update when it (hopefully) reaches the end…
max_playlist_length to “81920”
max_output_buffer_size to “81920”
Thanks for the help!
By the looks of it /var/log will be full long before it will reach the end of the import, but let’s keep hopes up and see what happens… 
Yeah, /var/log is full now, but this doesn’t seem to stop the import so far, the number of tracks is still increasing…
volumio@volumio:/var/log$ df -h
Filesystem Size Used Avail Use% Mounted on
overlay 28G 349M 27G 2% /
/dev/sdb2 2.7G 1.8G 742M 72% /imgpart
/dev/loop0 579M 579M 0 100% /static
devtmpfs 1.5G 0 1.5G 0% /dev
tmpfs 1.5G 64M 1.5G 5% /dev/shm
tmpfs 1.5G 4.9M 1.5G 1% /run
tmpfs 5.0M 4.0K 5.0M 1% /run/lock
tmpfs 1.5G 0 1.5G 0% /sys/fs/cgroup
tmpfs 1.5G 100K 1.5G 1% /tmp
tmpfs 1.5G 0 1.5G 0% /var/spool/cups
tmpfs 20M 20M 0 100% /var/log
tmpfs 1.5G 0 1.5G 0% /var/spool/cups/tmp
/dev/sdb1 487M 32M 455M 7% /boot
//192.168.1.134/1M 19T 8.9T 9.4T 49% /mnt/NAS/musiXerver
tmpfs 302M 0 302M 0% /run/user/1000volumio@volumio:/var/log$ ls -l
total 20480
-rw-r--r-- 1 root root 21174 Mar 1 08:13 Xorg.0.log
-rw-r--r-- 1 root root 1671 Mar 1 08:13 boot.log
-rw------- 1 root utmp 0 Mar 1 08:13 btmp
-rw-r--r-- 1 root root 20824064 Mar 1 08:58 mpd.log
-rw-r--r-- 1 volumio volumio 81920 Mar 1 08:57 volumio.log
-rw-rw-r-- 1 root utmp 1920 Mar 1 08:14 wtmpEditing mpd.conf with the values suggested and then restarting MPD (via systemctl) has improved things for me.
The scan completes and I have re-gained access to my library. No errors in mpd.log. I hope this persists,
Jim
All good for me, the import has completed… browsing the library really is painfully slow and if I open the list of albums the interface crashes… but one thing at the time, at least all my music is there 
You guys are lucky, in my case it’s still not working. Maybe because I am using a local USB hard disk and not a NAS?
The posted suggestion is still working for me – 11 hours and a re-boot later. Similar to what amatala reported , though, the system is sluggish – cover art doesn’t appear, or appears only very slowly, refreshing the browser display is slow and so on. But there is no memory allocation exception reported in mpd.log and playback seems fine so far.
Since version 2.729 it stopped working again for me and I’ve been waiting for an update for weeks now… Need to give up on this as it’s clearly not stable enough to used in decent conditions…
You have a huge library… Which hardware are you using?
I didn’t have any luck with newer versions than 2.699. Any more recent would have the same issue as described here. 2.699 is the most stable version I’ve found and I’m sticking to it, give it a try.
Which platform are you on?
The issue originates by some buffer sizes of MPD (which can allow to browse big libraries without problems). Issue is, they work on some platform while they absolutely don’t in others. We need to understand how\where they work.
SIDE NOTE: We are working on our own database engine which will be able to handle 1) Big libraries 2) Libraries with corrupted files. Its about one year we work on that, not easy task but we are seeing the end of it…
Sorry don’t know if the question was for Amatala or me - I use a Sparky (Allo USBridge).
That DB engine project sounds like a major work, good luck (and looking forward to it!).
Ok, this is an interesting feedback.
Can you post here the mpd.conf you have?
There you go:
music_directory “/var/lib/mpd/music”
playlist_directory “/var/lib/mpd/playlists”
db_file “/var/lib/mpd/tag_cache”
log_file “/var/log/mpd.log”
#pid_file “/var/run/mpd/pid”
#state_file “/var/lib/mpd/state”
#sticker_file “/var/lib/mpd/sticker.sql”
###############################################################################
user “mpd”
group “audio”
bind_to_address “any”
#port “6600”
#log_level “default”
gapless_mp3_playback “no”
#save_absolute_paths_in_playlists “no”
#metadata_to_use “artist,album,title,track,name,genre,date,composer,performer,disc”
auto_update “yes”
#auto_update_depth “3”
###############################################################################
follow_outside_symlinks “yes”
follow_inside_symlinks “yes”
###############################################################################
input {
plugin “curl”
}
###############################################################################
###############################################################################
resampler {
plugin “soxr”
quality “high”
threads “1”
}
audio_output {
type “alsa”
name “alsa”
device “hw:1,0”
dop “no”
audio_output {
type “fifo”
enabled “no”
name “multiroom”
path “/tmp/snapfifo”
format “44100:16:2”
}
#replaygain “album”
#replaygain_preamp “0”
volume_normalization “no”
###############################################################################
audio_buffer_size “2048”
buffer_before_play “10%”
###############################################################################
#connection_timeout “60”
max_connections “20”
max_playlist_length “81920”
max_command_list_size “81920”
max_output_buffer_size “81920”
###############################################################################
filesystem_charset “UTF-8”
id3v1_encoding “UTF-8”
###############################################################################
Hi there,
I am also having a trouble getting volumio working with a large db.
just updatet volumio to 2.861 on a raspberry PI3 with music attached to NAS.
Right now the system is not useable for me.
Some things i recognized so far:
So due to the crashing mpd volumio itself can not get any information about the db for its interface, but also webradio does not work 
But mpd itself with mpc add “url to stream” and playing works fine
The volumio image from 02.2020 worked fine with exact the same music db till yesterday.
I am now going to test the buster beta.
Hi everybody,
i have similar problems with my raspi 3 and hifiberry DAC+.
Library update stops somewhere in the middle. Then the indexed part of the library might be searchable for some time. Then the library gets lost. The network drive is still shown as connected in the sources menu but the number of titles is 0.
The library is on a usb 3.0 harddisk connected to the fritzbox router. Network access is with samba share.
I also tried to connect the harddisk directly to the raspi. I also gave it a try with an usb 3.0 ssd drive.
I tried ntfs and ext3 formatted drives.
My library has about 100.000 songs.
The library update stops or hangs not always at the same point. At 2.000 songs at 50.000 songs - what ever. So i guess it is not a wrecked file in the library.
I have tried various smb mounting options from this and other communities.
Changing the mpd.conf parameters as suggested made no difference.
No difference in using volumio-2.853-2020-11-20-pi.img or volumio-2.698-2020-01-16-pi.img
My next try is the 3.x beta
switching to the volumio3 beta helped solve the issue