为了方便起见，这里还为一些参数提供了好多单字母命令行选项开关。它们在下面的表17-1里描述。其中一些选项仅仅是因为历史原因而存在的，尽管它们是单字母选项，但是并不表示它们很常用。
表17-1. 短选项键字
| 短选项 | 等效 |
|---|---|
| -A x | debug_assertions = x |
| -B x | shared_buffers = x |
| -d x | log_min_messages = DEBUGx |
| -e | datestyle = euro |
| -fb, -fh, -fi, -fm, -fn, -fs, -ft | enable_bitmapscan = off, enable_hashjoin = off, enable_indexscan = off, enable_mergejoin = off, enable_nestloop = off, enable_seqscan = off, enable_tidscan = off |
| -F | fsync = off |
| -h x | listen_addresses = x |
| -i | listen_addresses = '*' |
| -k x | unix_socket_directory = 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 |