These are the packages that would be merged, in order:

Calculating dependencies ... done!
Dependency resolution took 0.99 s (backtrack: 0/20).

[ebuild  N     ] acct-group/aerospike-amc-0-r2::gentoo  0 KiB
[ebuild  N     ] acct-user/aerospike-amc-0-r2::gentoo  0 KiB
[ebuild  N     ] app-admin/aerospike-amc-community-4.0.19-r2::gentoo  7685 KiB

Total: 3 packages (3 new), Size of downloads: 7685 KiB