Koerr's questions

This is my nginx proxy_cache config:

proxy_cache cache_one;
location ~ \.(jpg|png|gif) {
    proxy_cache_valid 1d;
}

It's worked but I never know the images expiration time in any way

I wanna add a header for expiration time like this:

location ~ \.(jpg|png|gif) {
    proxy_cache_valid 1d;
    add_header expires $proxy_cache_expires;
}

Is this possible? how can I get $proxy_cache_expires ?

I want to cache all *.html files in a Nginx reverse proxy, So I added the config:

# Original configuration
location = / {
    proxy_pass   http://192.168.12.12:91;
    proxy_set_header        Host $host;
    proxy_set_header        X-Real-IP $remote_addr;
    proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;
}

# Added for cache
location ~ \.html {
    proxy_pass   http://192.168.12.12:91;
    proxy_set_header        Host $host;
    proxy_set_header        X-Real-IP $remote_addr;
    proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;

    proxy_cache cache_one;
    proxy_cache_key $host$uri$is_args$args;
    proxy_cache_valid 200 301 302 1m;
    proxy_cache_valid any 1m;
    expires     1m;
}

Repeat twice proxy_pass and proxy_set_header feel bad

How can I optimize this? Thanks!

Possible Duplicate:
Linux out of memory on VPS

In my Ubuntu 11.10 VPS, Before I run the jar file:

# free -m
             total       used       free     shared    buffers     cached
Mem:           256          5        250          0          0          0
-/+ buffers/cache:          5        250
Swap:            0          0          0

Run a jar file that limited to maximum of 32M memory:

java -Xms8m -Xmx32m -jar ./my.jar

Now the memory state as follows:

# free -m
             total       used       free     shared    buffers     cached
Mem:           256        155        100          0          0          0
-/+ buffers/cache:        155        100
Swap:            0          0          0

This jar occupied 150M memory.

And I can't run any other java command:

# java -version
Error occurred during initialization of VM
Could not reserve enough space for object heap
Could not create the Java virtual machine.

# java -Xmx8m -version  
Error occurred during initialization of VM
Could not reserve enough space for object heap
Could not create the Java virtual machine.

I want to know why the -Xmx parameter does not take effect?

How can I limit the jar file using the memory?

I configured a mail server on ubuntu with postfix (follow this answer)

Now I would like to set a catch-all email.

How do I go about doing this?

I'm using resin(tomcat) back in nginx(apache) parse JSP file only,like this:

        location ~ \.jsp {
            // 88 is resin(tomcat) port
            proxy_pass   http://localhost:88; 
        }

should I activate keepalive in resin(tomcat)?

I can stop nginx server using nginx -s stop or nginx -s quit.

What is the difference?

nginx conf:

location / {
            rewrite ^/cache.html$ /cache.jsp last;
}
location ~ \.jsp {
            proxy_pass   http://127.0.0.1:85;
            #if I add proxy_cache here,will be cache every JSP file,I don't want it
}
#location ~ \.html {
            #I want cache all ".html" page,but it's not work.
            #proxy_cache cache;
            #....
#}

I using a rewrite rule to mapping /cache.html to /cache.jsp

I want to access http//localhost/cache.html to cache page,

but access http//localhost/cache.jsp with out cache,

how to do? thanks for help :)