[Evolution] memory usage in evolution 2.8.0 and disk usage

[Abylai Ospan <aospan netup ru>]

Good day !

I'v installed new evolution 2.8.0 and memory usage is lower - aproximately 200 MB (at the past memory usage is 500-600 MB) but disk usage is greatly increased ... I'm using top to control system load and when evolution doing mail check there is 0 % idle and 85% wait (disk usage):

Cpu(s): 18.2% us,  9.6% sy,  0.0% ni,  0.0% id, 70.6% wa,  1.3% hi,  0.3% si
Mem:   1555264k total,  1378232k used,   177032k free,    14392k buffers
Swap:  1044184k total,   207188k used,   836996k free,   734028k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
21874 aospan    16   0  206m 112m  19m S 22.5  7.4  30:05.01 evolution

How increase memory usage in evolution ? May be when evolution use more memory it don't use disks so hard ? 
Thanks !

wbr, Abylai