Value for Memcache Pool Size in high traffic Web Site

[Kiran Kumar]

I am using XMemcache 1.4.5 .

In a high traffic web site ,where a CLient will be continously listening to 
Memcache ( A thread is started per User , which will be listening on 
Memcache)

In this environment , i am setting the the pool size to value 5 as shown 
below

MemcachedClientBuilder builder = new XMemcachedClientBuilder(
                AddrUtil.getAddresses(location));

builder.setConnectionPoolSize(5);

I am not sure if this Pool Size will be sufficient or not , please share 
your ideas .