Performance screen shot attached - nothing unusual. Memory shouldn't be an issue - 32 GB memory. No background processes running. System specs below, truncated to meet space limitations:
Library
Total files: 2,330,989
Audio files: 845,950
Image files: 1,061,118
Video files: 2,157
Other files: 421,764
Processing
Thumbnails built: 0% (38 of 2330989)
Audio analyzed: 1% (9873 of 848107)
Background Tools Running
No tools currently running
Power
No entries that affect the system power state
Media Center
Version: 25.0.54 registered
Install path: C:\Program Files\J River\Media Center 25\
Interface plug-ins: Interface Plugins: TiVo Server (not running)
JRMark: 3443 (version 23.0.84)
Memory used: 676 MB memory
Handles used: 590 handles
Advanced System Info
Memory & CPU
CPU features: MMX, SSE2, SSE3, SSSE3, SSE4.1, AVX
Free Physical Memory: 24.8 GB
Total Logical Cores: 12
Total Memory: 31.8 GB
Operating System
Microsoft Windows 10 64-bit
Audio inputs and outputs
ASUS VS247-4 (NVIDIA High Definition Audio) (driver 10.0.17134.1)
Aux (ASUS Xonar DGX Audio Device) (driver 10.0.17134.1)
Line In (ASUS Xonar DGX Audio Device) (driver 10.0.17134.1)
Microphone (ASUS Xonar DGX Audio Device) (driver 10.0.17134.1)
Realtek Digital Output (Realtek High Definition Audio) (driver 10.0.17134.1)
Realtek Digital Output(Optical) (Realtek High Definition Audio) (driver 10.0.17134.1)
S/PDIF Pass-through Device (ASUS Xonar DGX Audio Device) (driver 10.0.17134.1)
Speakers (3- Schiit Modi Uber) (driver 10.0.17134.1)
Speakers (ASUS Xonar DGX Audio Device) (driver 10.0.17134.1)
Speakers (Realtek High Definition Audio) (driver 10.0.17134.1)
Stereo Mix (ASUS Xonar DGX Audio Device) (driver 10.0.17134.1)
Wave (ASUS Xonar DGX Audio Device) (driver 10.0.17134.1)