For convenience there are also single letter command-line option switches available for some parameters. They are described in Table 19.3. Some of these options exist for historical reasons, and their presence as a single-letter option does not necessarily indicate an endorsement to use the option heavily.
Table 19.3. Short Option Key
| Short Option | Equivalent |
|---|---|
-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 = |