Question

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