Question

每次调用参数化查询时，我都会在日志文件中输出太多内容。例如，当将3个用户插入表中时，我得到以下日志输出：

2013-10-29 06:01:43 EDT LOG:  duration: 0.000 ms  parse <unnamed>: INSERT INTO users (login,role,password) VALUES
     ($1,$2,$3)
    ,($4,$5,$6)
    ,($7,$8,$9)
2013-10-29 06:01:43 EDT LOG:  duration: 0.000 ms  bind <unnamed>: INSERT INTO users (login,role,password) VALUES
     ($1,$2,$3)
    ,($4,$5,$6)
    ,($7,$8,$9)
2013-10-29 06:01:43 EDT DETAIL:  parameters: $1 = 'guest', $2 = 'user', $3 = '123', $4 = 'admin', $5 = 'admin', $6 = '123', $7 = 'mark', $8 = 'power user', $9 = '123'
2013-10-29 06:01:43 EDT LOG:  execute <unnamed>: INSERT INTO users (login,role,password) VALUES
     ($1,$2,$3)
    ,($4,$5,$6)
    ,($7,$8,$9)
2013-10-29 06:01:43 EDT DETAIL:  parameters: $1 = 'guest', $2 = 'user', $3 = '123', $4 = 'admin', $5 = 'admin', $6 = '123', $7 = 'mark', $8 = 'power user', $9 = '123'
2013-10-29 06:01:43 EDT LOG:  duration: 4.000 ms

注意，整个查询出现三次 - 用于解析，用于绑定和执行。完整的参数集出现两次 - 用于绑定和执行。

请注意，这种额外的详细程度仅在运行参数化查询时才会出现。

这是我的配置：

C:\Program Files\PostgreSQL\9.2\data>findstr log_ postgresql.conf
# "postgres -c log_connections=on".  Some parameters can be changed at run time
log_destination = 'stderr'              # Valid values are combinations of
log_directory = 'pg_log'                # directory where log files are written,
log_filename = 'postgresql-%Y-%m-%d_%H%M%S.log' # log file name pattern,
log_file_mode = 0600                    # creation mode for log files,
#log_truncate_on_rotation = off         # If on, an existing log file with the
#log_rotation_age = 1d                  # Automatic rotation of logfiles will
#log_rotation_size = 10MB               # Automatic rotation of logfiles will
#syslog_facility = 'LOCAL0'
#syslog_ident = 'postgres'
log_min_messages = notice               # values in order of decreasing detail:
log_min_error_statement = error # values in order of decreasing detail:
log_min_duration_statement = 0  # -1 is disabled, 0 logs all statements
#log_checkpoints = off
#log_connections = off
#log_disconnections = off
#log_duration = off
#log_error_verbosity = default          # terse, default, or verbose messages
#log_hostname = off
log_line_prefix = '%t '                 # special values:
#log_lock_waits = off                   # log lock waits >= deadlock_timeout
log_statement = 'all'                   # none, ddl, mod, all
#log_temp_files = -1                    # log temporary files equal or larger
log_timezone = 'US/Eastern'
#log_parser_stats = off
#log_planner_stats = off
#log_executor_stats = off
#log_statement_stats = off
#log_autovacuum_min_duration = -1       # -1 disables, 0 logs all actions and

C:\Program Files\PostgreSQL\9.2\data>

所以，我的问题是如何在不影响其他查询的情况下减少参数化查询日志的详细程度？理想情况下，我想将查询SQL及其参数记录一次。

Answer 1

我认为这不可能开箱即用。您可以编写日志记录挂钩并过滤日志条目。

Answer 2

在上述配置之前，我遇到的相同问题就是更改log_min_duration_statement=-1（禁用），该查询将仅被记录一次

但是您启用了持续时间，它将只记录持续时间3次但不记录查询
像

2013-10-29 06:01:43 EDT LOG:  duration: 0.000 ms 
2013-10-29 06:01:43 EDT LOG:  duration: 0.000 ms
2013-10-29 06:01:43 EDT LOG:  execute <unnamed>: INSERT INTO users (login,role,password) VALUES
     ($1,$2,$3)
    ,($4,$5,$6)
    ,($7,$8,$9)
2013-10-29 06:01:43 EDT DETAIL:  parameters: $1 = 'guest', $2 = 'user', $3 = '123', $4 = 'admin', $5 = 'admin', $6 = '123', $7 = 'mark', $8 = 'power user', $9 = '123'
2013-10-29 06:01:43 EDT LOG:  duration: 4.000 ms

减少postgresql日志详细程度

2 个答案: