Rinsed PHP memory, crashed site

Hi there – hoping someone out there can help.

We use Geomashup on a clients site, great plugin that has helped elevate their project pages. However! The site went down over the weekend. Our hosts have identified this plugin as the cause as it used up the PHP limit. This is the message back from them:

we’re seeing this error on the homepage:
`
Warning: getmypid() has been disabled for security reasons in /www/wp-content/plugins/geo-mashup/vendor/freemius/wordpress-sdk/includes/class-fs-logger.php on line 91 Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 6591511 bytes) in /www/wp-includes/wp-db.php on line 1171
`
The culprit of the 500 error is the ‘Geo Mashup’ plugin — it’s exhausting your PHP memory limit. I’ve increased this to help, and that’s brought the site back online. If this happens again we’ll need to increase the limit further, _or_ you’ll want to look into replacing the plugin with an alternative.

Can anyone shed any light on to whats happening, and how we can make sure that is doesn’t happen again? The thing is, we don’t even call any maps on the homepage.