looks like lsphp5 crash is the reason of slowness?
you may need rebuild php.
please check /opt/curlssl/lib/libcurl.so.4 is 32-bit or 64-bit. not sure if it's a problem to mix 32-bit and 64-bit library together.
also for:
/usr/tmpDSK 485M 24M 437M 6% /tmp
we have...