Oink

If you're looking for a free Rails plug-in that can help you identify the source(s) of increased memory usage in your Rails applications, then Oink might just be what you need. Not only does Oink add memory and active record instantiation information to your Rails log during runtime, but it also provides an executable that can assist with digesting your enhanced logs.

With Oink, you can specify a minimum threshold and a metric (either memory or active record instantiation), and then get the following reports from the Oink executable:

- The top ten single requests that exceeded the threshold for the metric, ordered by the request that exceeded the threshold the most
- The number of times each action exceeded the threshold for the metric, ordered by the action that exceeded the threshold the most
- If you're in verbose mode, you can also get the log lines produced by requests that exceeded the threshold.

Overall, Oink can be a helpful tool for devs who are trying to optimize their Rails applications and reduce memory usage. So, if you're looking for an efficient and free Rails plug-in, Oink is definitely worth checking out.