What does the "Resumed SSL Session" mean?

Question related:

Here is the samples

SSL Connection Statistics for "mall.shinsegae.com"
Open SSL connections : 0
Accepted SSL connections : 18540
Requested SSL connections : 18545

SSL Session Statistics for "mall.shinsegae.com"
Resumed SSL sessions : 18498
Resumable SSL sessions : 42
Session Misses : 0

ANSWER:

When ssl session reuse is ON (ssl settings reuse), the Array caches the ssl sessions -- if the same client comes back, it will not require to go thought the full ssl hankshake(cache hit). When even there is a cache hit, the “Resumed SSL sessions” counter will increase by 1.