Prometheus memory use depends on how much data you're feeding it. Look at prometheus_tsdb_head_series and rate(prometheus_tsdb_head_samples_appended_total[5m]).
I usually recommend planning to shard your Prometheus by namespace when the head series is over 2 million. On Wed, Jul 8, 2020 at 9:44 AM 白洋洋 <[email protected]> wrote: > Ok,thank you .But the expression > "container_memory_usage_bytes{container_name="prometheus"}", which is a > metrics of kubernetes-cadvisor, shows the memory that Prometheus used is > about 33G,Isn't it a little too high？Is it that most of this memory is > cache, and we don't need to worry about it?（The memory of the computer is > 48G） > > 在 2020年7月8日星期三 UTC+8下午2:56:08，Ben Kochie写道： >> >> Prometheus only uses what memory it needs. You can see this >> with process_resident_memory_bytes and go_memstats_alloc_bytes. Cache >> memory is not part of Prometheus, it is controlled by the kernel. >> >> On Wed, Jul 8, 2020 at 8:47 AM 白洋洋 <[email protected]> wrote: >> >>> >>> The picture below shows the memory that Prometheus used.As we can >>> see,the average memory is about 33G,and that's a lot of memory.Then I use >>> the command "free -h" to check the memory usage.The result is shown that >>> the most memory the prometheus used is cache.Would you tell me What is >>> the Prometheus's memory elimination strategy?Under what circumstances will >>> Prometheus clean up the cache ?Thank you. >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "Prometheus Users" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to [email protected]. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/prometheus-users/5739771b-3d2a-4d8a-9577-c04d40d7c926o%40googlegroups.com >>> <https://groups.google.com/d/msgid/prometheus-users/5739771b-3d2a-4d8a-9577-c04d40d7c926o%40googlegroups.com?utm_medium=email&utm_source=footer> >>> . >>> >> -- > You received this message because you are subscribed to the Google Groups > "Prometheus Users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/prometheus-users/4361317e-718e-4be9-bb06-4b5a21775dd1o%40googlegroups.com > <https://groups.google.com/d/msgid/prometheus-users/4361317e-718e-4be9-bb06-4b5a21775dd1o%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "Prometheus Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/prometheus-users/CABbyFmphmLO9KVDr9hQG_mqe72p3LfMSEj-HU8OU2n6LBBW%3D_g%40mail.gmail.com.
