I'd highly recommend Solr[0] for searching to cut down the load. Or, if this is a static site, you could use Lunr[1] to have an efficient search that runs on the client. Is this site OSS?
Thank you. I will check out Solr. I'm using Elasticsearch currently for the readmes, but I disabled it while troubleshooting so it's currently just searching on titles and descriptions via mysql. I will re-enable elasticsearch later and figure out how to better optimize it for future traffic.
[0] https://lucene.apache.org/solr/
[1] https://lunrjs.com/