Free memory used for static ?

Got an ESP32 wrover board and tried to get Espruino running.
Main idea was to use additional PSRAM for jsvars.
Problem is, I ran into memory problems, exactly the problem I tried to avoid :-(
Espressif told this:

What happened here is that you have filled up your internal memory
with static variables up to the point where there is no room anymore
for the 32K pool of reserved DMA memory.

I've in mind about a similiar problem (for ESP8266 ?).
Any idea, what I can do ?