I run the non-exit relay Logforme (855BC2DABE24C861CD887DB9B2E950424B49FC34).
Today I saw a new warning in my tor log file: Dec 07 09:48:12.000 [warn] Failing because we have 32735 connections already. Please read doc/TUNING for guidance.
The relay runs on an old Debian Wheezy machine. Me being a Linux noob I tried to read the doc/TUNING document (https://gitweb.torproject.org/tor.git/tree/doc/TUNING) but the only information I deemed suitable for me was "Use ulimit -n", which I ran and it reported "1024". I guess that's not of interest for this warning.
Over the years I have added some stuff to my sysctl.conf file that I have picked up. Don't remember from where: # Tor net.core.rmem_max = 33554432 net.core.wmem_max = 33554432 net.ipv4.tcp_rmem = 4096 87380 33554432 net.ipv4.tcp_wmem = 4096 65536 33554432 net.core.rmem_default = 524287 net.core.wmem_default = 524287 net.core.optmem_max = 524287 net.core.netdev_max_backlog = 300000 net.ipv4.tcp_mem = 33554432 33554432 33554432 net.ipv4.tcp_max_orphans = 300000 net.ipv4.tcp_max_syn_backlog = 300000 net.ipv4.tcp_fin_timeout = 4 vm.min_free_kbytes = 65536 net.ipv4.tcp_keepalive_time = 60 net.ipv4.tcp_keepalive_intvl = 10 net.ipv4.tcp_keepalive_probes = 3 net.ipv4.ip_local_port_range = 1025 65530 net.core.somaxconn = 30720 net.ipv4.tcp_max_tw_buckets = 2000000 net.ipv4.tcp_timestamps = 0 net.ipv4.tcp_challenge_ack_limit = 999999999
None of the values seem to match the 32735 mentioned in the warning so I'm at a loss for what I am supposed to change. Anyone knowledgeable of these things that can give me some pointers?