Well, I tried an externally powered drive and the problem remains. It’s a 2tb drive, so the 4tb partition on the earlier drive is also not the cause of the problem.
Here’s what top shows when I attempt to scroll through my library by song title (or artist or album) using android app Squeezer. After a few seconds of this, music playback stops until the app and server manage to display the next screenfull of song titles. Notice that PID 457 (squeezeboxserver) is at 100% CPU while the total pi3 cpu usage is only at about 25%. That makes it seem that the SB server is only utilizing a single core of the four, when instead it should probably have its streaming service on a dedicated thread/core to prevent such things as this from causing streaming to stop. (?)
top – 12:17:57 up 28 min, 1 user, load average: 0.51, 0.94, 0.92
Tasks: 160 total, 2 running, 158 sleeping, 0 stopped, 0 zombie
%Cpu(s): 24.8 us, 0.2 sy, 0.0 ni, 74.9 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
KiB Mem: 882788 total, 481288 used, 401500 free, 1632 buffers
KiB Swap: 102396 total, 72 used, 102324 free. 258004 cached MemPID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
457 squeeze+ 20 0 124452 114440 4120 R 100.0 13.0 2:16.04 squeezeboxserve
3426 pi 20 0 6808 1148 732 R 0.7 0.1 0:03.66 top
788 shellin+ 20 0 5904 2096 1184 S 0.3 0.2 0:00.83 shellinaboxd
