Drupal Proxy/Spamming Attempts Can Cause Trouble
A few weeks back, a client was facing a severe problem: their database disk space consumption was steadily going up for no apparent reason. I was called in to help, and provided with the hosting control panel password as well as the Drupal admin password.
Investigation and Findings
Upon investigation, I found out two things quickly:
- They were using an old Drupal version based on CivicSpace. It was a 4.4 or earlier version.
- The cache was growing very fast. For such a relatively small site, cache was 184 MB alone! Larger than the content of anything else on the side (including comments, node, and accesslog).
When I emptied the cache table, it started to grow again almost immediately.
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