some tiles are not available and some are showing

General talk
1

hello
i installed the tile server with this manual
https://www.linuxbabe.com/ubuntu/openstreetmap-tile-server-ubuntu-18-04-osm
but my server dont show images
http://88.135.36.47/osm/slippymap.html

when i restarted the rendered it dont show any error:


peiman@map2:/home/osm$ sudo /etc/init.d/renderd restart
[ ok ] Restarting renderd (via systemctl): renderd.service.

but some images dont loading and some are showing
is there any timeout in Apache or in rendered? it seems due to low ram and hard it get timeout!

syslog

peiman@map2:~$ tail -f /var/log/syslog
Jul 10 06:52:32 map2 renderd[23849]: DEBUG: Connection 1, fd 9 closed, now 3 left
Jul 10 06:52:32 map2 renderd[23849]: DEBUG: Failed to read cmd on fd 11
Jul 10 06:52:32 map2 renderd[23849]: DEBUG: Sending render cmd(3 default 15/21295/13875) with protocol version 2 to fd 8
Jul 10 06:52:32 map2 renderd[23849]: DEBUG: Connection 2, fd 11 closed, now 2 left
Jul 10 06:52:32 map2 renderd[23849]: DEBUG: Failed to read cmd on fd 8
Jul 10 06:52:32 map2 renderd[23849]: DEBUG: Connection 0, fd 8 closed, now 1 left
Jul 10 06:52:32 map2 renderd[23849]: DEBUG: Failed to read cmd on fd 10
Jul 10 06:52:32 map2 renderd[23849]: DEBUG: Connection 0, fd 10 closed, now 0 left
Jul 10 06:55:01 map2 CRON[8421]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1)
Jul 10 06:59:24 map2 systemd[1]: Started Session 92 of user peiman.
2

What information is there in the main system logfile?

" tail -f /var/log/syslog" will show tile requests as they come in and are dealt with (or not). If you look at what gets written after a “renderd restart”, you might see the error stopping tiles being created.