Config file for 1k plus devices

I have about 1.5k devices they send data every 5sec when vehicle is moving and 5 minutes when vehicle is stop. when I open the admin account with all vehicles the UI keeps acting up. Buttons dont click, panes take forever to move when open or minimized. running on ubuntu 18.04 with postgres as the database

my service file config:

This is [Unit]
Description=traccar
After=network.target

[Service]
Type=simple
WorkingDirectory=/opt/traccar
User=traccar
Group=traccar
ExecStart=/opt/traccar/jre/bin/java -Djdk.tls.client.protocols=TLSv1.2  -Xms4096m -Xmx6144m  -jar tracker-server.jar conf/traccar.xml
SyslogIdentifier=traccar
SuccessExitStatus=143
LimitNOFILE=50000

[Install]
WantedBy=multi-user.target 

While my traccar.xml is:

    <entry key='geocoder.onRequest'>true</entry>
    <entry key='geocoder.ignorePositions'>true</entry>
    <entry key='geocoder.reuseDistance'>200</entry>

    <entry key='filter.enable'>true</entry>
    <entry key='filter.limit'>60</entry>
    <entry key='filter.invalid'>true</entry>
    <entry key='filter.zero'>true</entry>
    <entry key='filter.duplicate'>true</entry>

    <entry key='niot.custom'>true</entry>
    <entry key='niot.port'>9980</entry>
    <entry key='niot.timout'>10</entry>

Your browser won't be able to handle that amount of data. It has nothing to do with server configuration.

What will be remedy for this. having devices in different accounts?