tile server for planet working slow and shows error on high end server
I have configured openstreet tile server for planet on ubuntu 12 on dell r730 with dual e5 xeon processors with 40 core total processor combined and 220GB DDR4 ram on sas hdd working on raid 10.
I first did setup for great britain map using osm.pbf file from geofabrick.de. then on successful working I did setup for planet.osm.pbf file.
Now after installing tile server for planet when I open http://192.168.1.2/osm/slippymap.html it shows map as ok but on zooming some places shows white tiles at certain level like when I zoom map for united states half of the united states displays white tile and after zooming further it shows some area maps just fine while some shows white tiles and after opening multiple times it displays those areas and for some it does not displays any maps but just white tiles only even after waiting for days.
Please let me know how to resolve this issue.
I build map using this link https://switch2osm.org/serving-tiles/building-a-tile-server-from-packages/