Why the system becomes unresponsive before system total memory be reached ?
I've 2G DDR3 installed (1802MB usable) but when memory usage reach ~1450MB the system starts to be unresponsive and stay freezing until the memory usage reduce.
% uname -r 3.14.11-1-lts % free -m total used free shared buffers cached Mem: 1802 1614 187 147 189 301 -/+ buffers/cache: 1123 679 Swap: 1023 206 817
To monitor memory usage I'm using a awesome wm widget.
Swap read speeds:
% sudo hdparm -tT /dev/sda5 /dev/sda5: Timing cached reads: 3958 MB in 2.00 seconds = 1979.41 MB/sec Timing buffered disk reads: 130 MB in 3.02 seconds = 43.03 MB/sec
Swap write speeds (not swap to be precise, but write speed to disk partition):
# dd if=/dev/zero of=/dev/sda5 bs=8k count=500000 54587+0 records in 54587+0 records out 447176704 bytes (447 MB) copied, 7.81582 s, 57.2 MB/s