修改监听的IP和端口
修改postgresql.conf文件
listen_addresses = '' # what IP address(es) to listen on; defaults to 'localhost'; use '' for all
port = 5432 # (change requires restart)
与数据库log相关的参数
修改postgresql.conf文件
logging_collector = on # Enable capturing of stderr and csvlog into log files. Required to be on for csvlogs.
log_directory = 'pg_log' # directory where log files are written, can be absolute or relative to PGDATA
日志切换与是否覆盖
log_filename:# log file name pattern, can include strftime() escapes
log_truncate_on_rotation:# If on, an existing log file with the same name as the new log file will be truncated rather than appended to. But such truncation only occurs on time-driven rotation, not on restarts or size-driven rotation. Default is off, meaning append to existing files in all cases.
log_rotation_age:# Automatic rotation of logfiles will happen after that time. 0 disables.
log_rotation_size:# Automatic rotation of logfiles will happen after that much log output. 0 disables.
每天生成一个新的日志文件
log_filename = 'postgresql-%Y-%m-%d_%H%M%S.log'
log_truncate_on_rotation = off
log_rotation_age = 1d
log_rotation_size = 0
每当日志写满一定的大小（如10MB空间），则切换一个日志
log_filename = 'postgresql-%Y-%m-%d_%H%M%S.log'
log_truncate_on_rotation = off
log_rotation_age = 0
log_rotation_size = 10M
只保留7天的日志，进行循环覆盖
log_filename = 'postgresql-%a.log'
log_truncate_on_rotation = on
log_rotation_age = 1d
log_rotation_size = 0
内存参数的设置
shared_buffers:默认32MB，共享内存的大小，主要用于共享数据块。设置得大一些，当读取数据时，就可以从共享内存中读，而不需要再从文件上读取。
work_mem:默认1MB，单个SQL执行时，排序、hash join所使用的内存，SQL运行完后，内存就释放了。设置大一些，会让排序操作快一些。