pace_select --memory-limit does not work properly

[ondracka]

I'm not sure if I understand properly how it should work, but my understanding is that by providing the --memory-limit pace_select should select an optimal batch size such that everything fits into the provided memory limit.

However it looks like pace_select allocates at least least twice the amount for example for --memory-limit=30GB top shows

    PID USER      PR  NI    VIRT    RES    SHR S  %CPU  %MEM     TIME+ COMMAND                          
  90312 ondracka  20   0   61.4g  60.5g  27012 R 377.9   6.0  62:54.37 pace_select