目录
环境
系统平台：Linux x86-64 Red Hat Enterprise Linux 7
版本：5.6.4
症状
后台进程缺少了autovacuum launcher process和stats collector process进程，数据库未能完全启动。
| postgres 5016 5015 0 15:32 pts/2 00:00:00 -bash postgres 5169 1 0 15:34 pts/1 00:00:00 /usr/pgsql-10/bin/postgres postgres 5170 5169 0 15:34 ? 00:00:00 postgres: logger process postgres 5172 5169 0 15:34 ? 00:00:00 postgres: checkpointer process postgres 5173 5169 0 15:34 ? 00:00:00 postgres: writer process postgres 5174 5169 0 15:34 ? 00:00:00 postgres: wal writer process postgres 5175 5169 0 15:34 ? 00:00:00 postgres: archiver process postgres 5176 5169 0 15:34 ? 00:00:00 postgres: bgworker: logical replication launcher |
检查数据库日志发现
| 2020-01-06 16:48:44.234 CST,,,7393,,5e12f46c.1ce1,2,,2020-01-06 16:48:44 CST,,0,LOG,XX000,"could not bind socket for statistics collector: Cannot assign requested address",,,,,,,,,"" 2020-01-06 16:48:44.234 CST,,,7393,,5e12f46c.1ce1,3,,2020-01-06 16:48:44 CST,,0,LOG,00000,"trying another address for the statistics collector",,,,,,,,,"" 2020-01-06 16:48:44.234 CST,,,7393,,5e12f46c.1ce1,4,,2020-01-06 16:48:44 CST,,0,LOG,XX000,"could not bind socket for statistics collector: Cannot assign requested address",,,,,,,,,"" |
问题原因
因为autovacuum launcher process和stats collector process进程需要通过本地回环接口收集统计信息，如果本地回环接口down掉，则这两个进程无法启动。
解决方案
启动本地回环接口。
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