Re: Apache + mod_php performance

On 9/25/2024 8:20 PM, Lawrence D'Oliveiro wrote:

On Wed, 25 Sep 2024 19:14:58 -0400, Arne Vajhøj wrote:
 

Based on some messages in error_log it looks like it uses mailboxes
APACHE$AWS_CONTROL_MBX_nn.
>
If every request result in mailbox comm between master process and a
child process, then that could slow down things.

 I also wonder about the difference in handling nondeterministic
communication.
 On *nix systems, you have poll/select (also other options like epoll or
kqueue, depending on the *nix variant) for monitoring multiple
communication channels at once, and all your files/pipes/sockets are
treated as byte streams.
 On VMS, you have to have async QIO calls pending on every channel that you
want to monitor, and all the communication channels are treated as record-
oriented.

I don't recognize that.
On VMS you can use select if using the socket API and
IO$_SETMODE|IO$M_READATTN if using $QIO(W) API.
And both socket API and $QIO(W) API are stream oriented.
Arne