plackup failures under https

choroba has asked for the wisdom of the Perl Monks concerning the following question:

I'm running two versions of my site at e-choroba.eu: there are two plackup processes, one runs the bare plackup, while the second one runs

plackup --enable-ssl --ssl-key-file=domain.key --ssl-cert-file=domain.
+crt app.psgi &> https-log
[download]

The problem is the plackup that servers https is quite unstable. I often find the https version not responding, and when I log to the server, I discover one of the two following situations:

The ssl plackup is down; the log file contains "Out of memory!" as the last line. I don't have much memory on the server, but normally, the process doesn't take more than 2% of the available memory.
The ssl plackup is running, but when I do
```
strace -fp <ssl-plackup-pid>
[download]
```
I only see
```
read(5,
[download]
```
while normally, when everything works, it shows
```
accept(4,
[download]
```

Any ideas what's wrong?

map{substr$_->[0],$_->[1]||0,1}[\*||{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^*ARGV,3]

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