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diff --git a/health/guides/redis/redis_bgsave_slow.md b/health/guides/redis/redis_bgsave_slow.md deleted file mode 100644 index 6a04bdf27..000000000 --- a/health/guides/redis/redis_bgsave_slow.md +++ /dev/null @@ -1,54 +0,0 @@ -### Understand the alert - -This alert, `redis_bgsave_slow`, indicates that the duration of the ongoing Redis RDB save operation is taking too long. This can be due to a large dataset size or a lack of CPU resources. As a result, Redis might stop serving clients for a few milliseconds, or even up to a second. - -### What is the Redis RDB save operation? - -Redis RDB (Redis Database) is a point-in-time snapshot of the dataset. It's a binary file that represents the dataset at the time of saving. The RDB save operation is the process of writing the dataset to disk, which occurs in the background. - -### Troubleshoot the alert - -1. Check the CPU usage - -Use the `top` command to see if the CPU usage is unusually high. - -```bash -top -``` - -If the CPU usage is high, identify the processes that are consuming the most CPU resources and determine if they are necessary. Minimize the load by closing unnecessary processes. - -2. Analyze the dataset size - -Check the size of your Redis dataset using the `INFO` command: - -```bash -redis-cli INFO | grep "used_memory_human" -``` - -If the dataset size is large, consider optimizing your data structure or implementing data management strategies, such as data expiration or partitioning. - -3. Monitor the Redis RDB save operation - -Use the following command to obtain the Redis statistics: - -```bash -redis-cli INFO | grep "rdb_last_bgsave_time_sec" -``` - -Review the duration of the RDB save operation (rdb_last_bgsave_time_sec). If the save operation takes an unusually long time or fails frequently, consider optimizing your Redis configuration or improving your hardware resources like CPU and disk I/O. - -4. Change the save operation frequency - -To limit the frequency of RDB save operations, adjust the `save` configuration directive in your Redis configuration file (redis.conf). For example, to save the dataset only after 300 seconds (5 minutes) and at least 10000 changes: - -``` -save 300 10000 -``` - -After modifying the configuration, restart the Redis service for the changes to take effect. - -### Useful resources - -1. [Redis Persistence](https://redis.io/topics/persistence) -2. [Redis configuration](https://redis.io/topics/config) |