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9d69786a6b
It was 64 for a long time, and even linux kernel never has such a small limit, it had 128 (net.core.somaxconn sysctl). But recently, in 5.4, the default value had been increased even in linux kernel, to 4096 [1]. [1]: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=19f92a030ca6d772ab44b22ee6a01378a8cb32d4 Let's increase it in ClickHouse too. Also note, that I've looked through some instances with clickhouse-server only, and TcpExtListenOverflows was non zero (`nstat -za`), in other words backlog of the listen socket indeed overflowed there. So it is better to increase the default to move the problem to clickhouse-server itself (yes you will unlikely have 4K new incomming connections at one time, with accept thread do not accept them all, but still seems that it is possible, maybe due to some locks or something else). |
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| .. | ||
| config.d | ||
| users.d | ||
| .gitignore | ||
| clickhouse-server.cpp | ||
| CMakeLists.txt | ||
| config.xml | ||
| config.yaml.example | ||
| embedded.xml | ||
| MetricsTransmitter.cpp | ||
| MetricsTransmitter.h | ||
| play.html | ||
| Server.cpp | ||
| Server.h | ||
| users.xml | ||
| users.yaml.example | ||