Update puma threads tunings (#3248)

guides/common/modules/con_puma-threads.adoc

@@ -1,21 +1,13 @@
 [id="Puma_Threads_{context}"]
 = Puma threads
 
-Number of Puma threads (per Puma worker) is configured by using two values: `threads_min` and `threads_max`.
+To configure the number of Puma threads (per Puma worker), use these values: `threads_min` and `threads_max`.
 
 Value of `threads_min` determines how many threads each worker spawns at a worker start.
 Then, as concurrent requests are coming and more threads is needed, worker will be spawning more and more workers up to `threads_max` limit.
 
 We recommend setting `threads_min` to same value as `threads_max` as having fewer Puma threads lead to higher memory usage on your {ProjectServer}.
 
-For example, we have compared these two setups by using concurrent registrations test:
-
-[width="100%",cols="50%,50%",options="header",]
-|===
-|{Project} VM with 8 CPUs, 40 GiB RAM |{Project} VM with 8 CPUs, 40 GiB RAM
-|`--foreman-foreman-service-puma-threads-min=0` |`--foreman-foreman-service-puma-threads-min=16`
-|`--foreman-foreman-service-puma-threads-max=16` |`--foreman-foreman-service-puma-threads-max=16`
-|`--foreman-foreman-service-puma-workers=2` |`--foreman-foreman-service-puma-workers=2`
-|===
-
-Setting the minimum Puma threads to `16` results in about 12% less memory usage as compared to `threads_min=0`.
+For example, we have compared these two setups on a virtual machine with 8 CPUs and 40 GiB RAM using concurrent registrations test.
+They both used `--foreman-foreman-service-puma-threads-max=16` and `--foreman-foreman-service-puma-workers=2`.
+Setting the minimum Puma threads to `16` by using `--foreman-foreman-service-puma-threads-min=16` results in about 12% less memory usage as compared to `0`.