Instead of storing the name of a hash in a variable, use a nested hash: 
use strict;

my %hash;

    my $server="jwesvsf7";
    my $timestamp = "123433";
    my $attribute="CPU_USER";
    my $key =$attribute."_".$server;
$hash{$key}{key} = 'value';

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In reply to Re: Strict, cant use string as hash ref by moritz
in thread Strict, cant use string as hash ref by westy032001

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