PostgreSQL �� ���ݎ��s���� psql �ŁA�p�����[�^��\������ɂ� "SHOW" �Ƃ����R�}���h���g�p���܂��B
psql=# SHOW checkpoint_segments;
checkpoint_segments
---------------------
32
(1 row)
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psql=# \x psql=# SHOW ALL; -[ RECORD 1 ]------------------------------------------------------------------- name | allow_system_table_mods setting | off description | Allows modifications of the structure of system tables. -[ RECORD 2 ]------------------------------------------------------------------- name | application_name setting | psql description | Sets the application name to be reported in statistics and logs. -[ RECORD 3 ]------------------------------------------------------------------- name | archive_command setting | (disabled) description | Sets the shell command that will be called to archive a WAL file.