In postgresql.conf, set:. PostgreSQL 12 will probably come with a solution to that. I was editing the configuration file for 12.1, but my application was connecting to 10.11. 20.6k 8 8 gold badges 63 63 silver badges 86 86 bronze badges. Alternatively log file in CSV format can be used by file_fdw About; Products ... answered Apr 2 '12 at 6:37. lambshaanxy lambshaanxy. add a comment | 6. Before PostgreSQL 12 the presence of the recovery.conf file told the instance to go into recovery. I would like to take a look at the PostgreSQL log files to see what my app writes to them but I can't find them. As noted in the comments to the answer, this particular box had both PostgreSQL 12.1 server and PostgreSQL 10.11 server installed on it. PostgreSQL database supports several replication solutions to build high-availability, scalable, fault-tolerant applications, one of which is Write-Ahead Log (WAL) Shipping.This solution allows for a standby server to be implemented using file-based log shipping or streaming replication, or where possible, a combination of both approaches. In this post we are going to understand everything about PostgreSQL timelines and history file. but data will be available in log files. Stack Overflow. Looking at your new information, I'd say there may be a few other settings to verify: make sure you have turned on the log_destination variable; ... – Greg Smith Jul 23 '12 at 19:11. 6. Edit. PostgreSQL creates and starts using a new log file when the conditions specified by parameters log_rotation_age or log_rotation_size are met. log_statement = 'all' (note the lack of the leading '#'). Another production-grade approach to managing log output is to send it to syslog and let syslog deal with file rotation. The default value of log_min_duration_statement is “-1”, which means disabled: For example, the name of a new log file that starts at 12:30pm will be postgresql.log.2019-04-01-1230. Restart the PostgreSQL Service Any ideas? You left log_statement commented out, so it's still at its default.. The issue with this however is, that this can cause a lot of activity in the server log file which of course is not good for performance as well. External tooling can parse the log files and store if required. For example, if you want to log all statements running on your PostgreSQL instance, a config file with the parameter value “log_statement=all” can be used. In your data/postgresql.conf file, change the log_statement setting to 'all'. PostgreSQL won’t store such information inside database. We’ve also uncommented the log_filename setting to produce some proper name including timestamps for the log files.. You can find detailed information on all these settings within the official documentation.. A 2000 word worth complete description with demonstration guide Then restart PostgreSQL. When there is no need to record all statements – perhaps after a troubleshooting exercise – the previous config file could be reinstated. You don't have to restart the whole computer, just the PostgreSQL server. To do this, set the configuration parameter log_destination to syslog (to log to syslog only) in postgresql.conf.Then you can send a SIGHUP signal to the syslog daemon whenever you want to force it to start writing a new log file. Now, that the file is gone there must be a new mechanism and that is the “standby.signal” file … Here we’re telling postgres to generate logs in the CSV format and to output them to the pg_log directory (within the data directory). 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