19.18. 短选项
为了方便起见，系统中还为一些参数提供了单字母的命令行选项开关。它们在表 19-2中描述。其中一些选项是由于历史原因而存在，并且它们作为一个单字母选项存在并不表示它们会被大量使用。
表 19-2. 短选项键
| 短选项 | 等效于 |
|---|---|
| -B x | shared_buffers = x |
| -d x | log_min_messages = DEBUGx |
| -e | datestyle = euro |
| -fb, -fh, -fi, -fm, -fn, -fo, -fs, -ft | enable_bitmapscan = off, enable_hashjoin = off, enable_indexscan = off, enable_mergejoin = off, enable_nestloop = off, enable_indexonlyscan = off, enable_seqscan = off, enable_tidscan = off |
| -F | fsync = off |
| -h x | listen_addresses = x |
| -i | listen_addresses = '*' |
| -k x | unix_socket_directories = x |
| -l | ssl = on |
| -N x | max_connections = x |
| -O | allow_system_table_mods = on |
| -p x | port = x |
| -P | ignore_system_indexes = on |
| -s | log_statement_stats = on |
| -S x | work_mem = x |
| -tpa, -tpl, -te | log_parser_stats = on, log_planner_stats = on, log_executor_stats = on |
| -W x | post_auth_delay = x |