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 20.4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 20.4. 短选项键
| 短选项 | 等效于 |
|---|---|
-B | shared_buffers = |
-d | log_min_messages = DEBUG |
-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 | listen_addresses = |
-i | listen_addresses = '*' |
-k | unix_socket_directories = |
-l | ssl = on |
-N | max_connections = |
-O | allow_system_table_mods = on |
-p | port = |
-P | ignore_system_indexes = on |
-s | log_statement_stats = on |
-S | work_mem = |
-tpa, -tpl, -te | log_parser_stats = on,
log_planner_stats = on,
log_executor_stats = on |
-W | post_auth_delay = |