service plexmediaserver stop
"/usr/lib/plexmediaserver/Plex SQLite" "/var/lib/plexmediaserver/Library/Application Support/Plex Media Server/Plug-in Support/Databases/com.plexapp.plugins.library.db" "PRAGMA page_size=65536" "PRAGMA journal_mode=DELETE" "VACUUM" "PRAGMA journal_mode=WAL" "PRAGMA optimize"
"/usr/lib/plexmediaserver/Plex SQLite" "/var/lib/plexmediaserver/Library/Application Support/Plex Media Server/Plug-in Support/Databases/com.plexapp.plugins.library.blobs.db" "PRAGMA page_size=65536" "PRAGMA journal_mode=DELETE" "VACUUM" "PRAGMA journal_mode=WAL" "PRAGMA optimize"
sed -i.bak -e 's/cache_size=2000/cache_size=9999/' '/usr/lib/plexmediaserver/Plex Media Server'
service plexmediaserver start