MongoDB log file

Question

I'm having problems with my configuration log file. I'm trying to log all operations but the only ones that are saved are the SERVER RESTARTED . My configuration file: ``` ##store data here dbpath=C:\data\db profile=2 ##all output go here logpath=C:\mongodb\log\mongo.log logappend=true ##log read and write operations diaglog=3 ``` What am I missing? and is there a way to configure mongo log file with java spring somehow (maybe xml)?

Accepted Answer

In general you do not want to use the `diaglog` configuration option as the diaglog binary files are both very verbose and also difficult to work with. With this setting enabled you will get a sequence of files in your `dbpath` directory named `diaglog.<time in hex>`. You can replay these files using the `mongosniff` tool, but this approach is mostly intended for driver/server development rather than end user troubleshooting.

FYI, the `diaglog` option has actually been deprecated as at MongoDB 2.6 (ref: SERVER-12149).

To log queries you should instead be looking at the Database profiler which can be enabled either globally (as you have done in your config with with `profile=2`) or per-database.

The profiling data will be saved in a capped `system.profile` collection with a default size of 1Mb per database. If you want to collect more history, you can create a larger `system.profile` collection.

Note that it is not recommended to run with profiling level 2 in production, as that will generate a write for every query to your database.

is there a way to configure mongo log file with java spring somehow (maybe xml)?

I wouldn't expect a driver to have options to configure the MongoDB server.

You can, however, invoke the `profile` command via the Java driver to adjust profiling options at runtime.

For example, you could enable profiling level 2 with something like:

```
db.command(BasicDBObjectBuilder.start().add("profile", 2).get());
```

MongoDB log file

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