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diff --git a/health/guides/memcached/memcached_cache_fill_rate.md b/health/guides/memcached/memcached_cache_fill_rate.md deleted file mode 100644 index ec276b3a7..000000000 --- a/health/guides/memcached/memcached_cache_fill_rate.md +++ /dev/null @@ -1,41 +0,0 @@ -### Understand the alert - -This alert, `memcached_cache_fill_rate`, measures the average rate at which the Memcached cache fills up (positive value) or frees up (negative value) space over the last hour. The units are in `KB/hour`. If you receive this alert, it means that your Memcached cache is either filling up or freeing up space at a noticeable rate. - -### What is Memcached? - -Memcached is a high-performance, distributed memory object caching system used to speed up web applications by temporarily storing frequently-used data in RAM. It reduces the load on the database and improves performance by minimizing the need for repeated costly database queries. - -### Troubleshoot the alert - -1. Check the current cache usage: - -You can view the current cache usage using the following command, where `IP` and `PORT` are the Memcached server's IP address and port number: - -``` -echo "stats" | nc IP PORT -``` - -Look for the `bytes` and `limit_maxbytes` fields in the output to see the current cache usage and the maximum cache size allowed, respectively. - -2. Identify heavy cache users: - -Find out which applications or services are generating a significant number of requests to Memcached. You may be able to optimize them to reduce cache usage. You can check Memcached logs for more details about requests and operations. - -3. Optimize cache storage: - -If the cache is filling up too quickly, consider optimizing your cache storage policies. For example, you can adjust the expiration times of stored items, prioritize essential data, or use a more efficient caching strategy. - -4. Increase the cache size: - -If needed, you can increase the cache size to accommodate a higher fill rate. To do this, stop the Memcached service and restart it with the `-m` option, specifying the desired memory size in megabytes: - -``` -memcached -d -u memcached -m NEW_SIZE -l IP -p PORT -``` - -Replace `NEW_SIZE` with the desired cache size in MB. - -### Useful resources - -1. [Memcached Official Site](https://memcached.org/) |