To avoid unnecessary cache writes, there&#x27;s also a plugin that does implement a rudimentary LRU. Basically, you have to see some amount of traffic before being allowed to get written to the cache. This is typically done in a scenario where it&#x27;s ok to hit the parent caches, or origins, once or a few times extra. It can also be a very useful way to avoid too heavy disk write load on SSD drives (which can be sensitive to excessive write wear, of course). See<p><a href="https:&#x2F;&#x2F;github.com&#x2F;apache&#x2F;trafficserver&#x2F;tree&#x2F;master&#x2F;plugins&#x2F;experimental&#x2F;cache_promote" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;apache&#x2F;trafficserver&#x2F;tree&#x2F;master&#x2F;plugins&#x2F;...</a>