[clamav-users] Clamd memory usage running high?

[Groach]

Recently, following previous enquires, Steve @ Sane graced us with some 
analysis on what typical memory usage was to be expected when using the 
3 common signature databases (default, Sane and Securiteinfo).  See the 
original post here: 
http://lists.clamav.net/pipermail/clamav-users/2016-December/003903.html.

In the thread there is a summary that reads:

 > Summary test:
 >
 > Using clamscan only to scan test.eml (3,706 bytes)
 >
 > ClamAV Official sigs only (daily/main):
 > pool memory used: 385.675 MB
 >
 > Official + *all* Sanesecurity/Distributed sigs
 > pool memory used: 467.359 MB
 > Time: 39.500 sec (0 m 39 s)
 >
 > Official + *all* Sanesecurity/Distributed + SecuriteInfo sigs
 >
 > Time: 86.344 sec (1 m 26 s)
 > pool memory used: 750.292 MB

(seen here: 
http://lists.clamav.net/pipermail/clamav-users/2016-December/003907.html 
- dated december 2016)

These figures resonate with my system (running Clamd on windows platform).

However, we have a forum contributor that claims that his system those 
signatures collectively run at 1.3GB usage. 
(https://www.hmailserver.com/forum/viewtopic.php?p=192885#p192885). Can 
anyone help explain why that would be or how to lower this memory footprint.

Thanks