Yes, Litespeed is even better as nginx does not support keepalive with the backend server, at least their document saying so, while Litespeed always use keepalive with backend servers.
If you are using a VPS, you can go with the VPS license, otherwise, go with 1-CPU license at the minimum.
Price is available at http://store.litespeedtech.com
try a phpinfo() page under Apache PHP, if it show the compile configuration, use the same configuration to compile lsphp5 from web console.
Otherwise, you have to find out what PHP module is enabled under Apache PHP and build a lsphp5 with similar configuration.
If your site has high traffic volume, or get DDoS attack frequently, or you manage your site with cPanel or other hosting control panel, you should consider the Enterprise edition, otherwise, the standard edition should be good.
If parent PID is 1, you can kill those lsphp4 processes. You can also strace those lsphp4 processes to check what they are doing.
No big change in lsphp4.
The trial has been tracked by the public IP address, so if your ISP assign a fixed IP, you won't able to run trial more than 30 days.
You can create a backup of VMware disk image with LSWS installed.
LiteSpeed Web Server 3.3.21 has been released
This release is mainly to improve access logging and reduce memory usage under mass virtual hosting enironment.
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Ruby LSAPI 3.4 has been released
Fixed a bug in calling STDERR.reopen()...