memcache and other performance tools

Hello Group,

I would humbly request some clarification on correctness of the following configurations without "//":

// $CONFIG->memcache = true;
// $CONFIG->memcache_servers = array (
 array('localhost', 11211),
 array('an ip address', 11211)

// namespace prefix
// $CONFIG->memcache_namespace_prefix = '';

I have memcache enabled (16 MB) and also selected in PHP 5.6

In control panel memchache shows up as following:
Socket Path:  unix:///home/sys/memcached.sock, Memory: 16MB, Status: Active
PHP Ext:

Furthermore, please clarify if I can take advantages of the following CPanel resources that I have:

1.NodeJS :Node.js is a platform built on Chrome's JavaScript runtime for easily building fast, scalable network applications. Node.js uses an event-driven, non-blocking I/O model that makes it lightweight and efficient, perfect for data-intensive real-time applications

If I try to enable it, Cpanel requests NodeJS Script Path: with a browse option which wants me to select a script.

2. Redis
Redis is an open source, in-memory data structure store, used as a database, cache and message broker. It supports data structures such as strings, hashes, lists, sets, sorted sets with range queries, bitmaps, hyperloglogs and geospatial indexes with radius queries. Redis has built-in replication, Lua scripting, LRU eviction, transactions and different levels of on-disk persistence, and provides high availability via Redis Sentinel and automatic partitioning with Redis Cluster. Many popular languages use Redis bindings, including: ActionScript, C, C++, C#,Java, JavaScript (Node.js), Perl, PHP, Pure Data, Python and Ruby.

I have it enabled and in Cpanel, it shows up as followings:
Socket: unix:///home/sys/redis.sock, Size 16 MB, Status: Active

3. Varnish
Varnish Cache is a web application accelerator also known as a caching HTTP reverse proxy. You install it in front of any server that speaks HTTP and configure it to cache the contents. Varnish Cache is really, really fast. It typically speeds up delivery with a factor of 300 - 1000x, depending on your architecture. One of the key features of Varnish Cache, in addition to its performance, is the flexibility of its configuration language, VCL. VCL enables you to write policies on how incoming requests should be handled. In such a policy you can decide what content you want to serve, from where you want to get the content and how the request or response should be altered.

Lastly other PHP 5.6 resource I have are
extension =
extension =
extension =
extension =
zend_extension = /usr/local/php5.6/lib/php/extensions/no-debug-non-zts-20131226/
zend_extension =
extension_dir = /usr/local/php5.6/lib/php/extensions/no-debug-non-zts-20131226/

I would like to know if elgg 2.3.4, Version - 2016092300 can take advantage of these resources or I may have to wait for future.

BTW, mysite url is It would be my honor if you look at my site and also register.

Performance and Scalability

Performance and Scalability

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