为了方便起见，一些参数还提供了单字母命令行选项开关。它们在 表 19.5 中进行了描述。其中一些选项是出于历史原因而存在的，其作为单字母选项的存在并不一定意味着赞成大量使用该选项。
表 19.5. 短选项键
| 短选项 | 等效选项 |
|---|---|
-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 = |