update specs at cymru

howto/new-machine-cymru.md

@@ -1361,8 +1361,8 @@ cluster. This documentation mostly concerns the latter.
 
 There are two main cluster of machines at the main PoP:
 
- * 13 old servers (mostly Dell R610 or R620 2xXeon with 386GB RAM and
-   2x500GB disk)
+ * 13 old servers (mostly Dell R610 or R620 2xXeon with a maximum of
+   386GB RAM per node and 2x500GB SAS disks)
  * 8 storage arrays (Dell MD1220 or MD3200 21TB)
  * 1 "newer" server(Dell PowerEdge R640 2 Xeon Gold 6230 CPU @ 2.10GHz
    (40 cores total), 1536 GB of RAM, 2x900GB SSD Intel(R) X550 4-port
@@ -1392,6 +1392,13 @@ whether it is installed (checked):
  * [x] `chi-node-13`: first test CI node
  * [x] `chi-node-14`: shadow simulator node (tpo/tpa/team#40279)
 
+Memory capacity varies between nodes:
+
+ * Nodes 1-4: 384GB (24x16GB)
+ * 5-7: 96GB (12*8GB)
+ * 8-10, 12-13: 192GB (24*8GB?)
+ * 11: unknown (issue https://gitlab.torproject.org/tpo/tpa/team/-/issues/40401)
+
 Also note that some of the uninstalled nodes above *have* some
 operating system installed, by Cymru, but that system can be safely
 wiped and replaced by the standard install procedure established in