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I need some help on speeding websites loading.
I have two virtual machines created on my ESXi host. Thay are both on public IP addresses and that is how they communicate.
On one virtual machines I have apache installed and configured and that is where the websites are located. It is shared hosting. And on the second virtual machine I have mysql 5.5 installed.
I configured it all and it all works. My websites are loading, but the problem is speed. I have waiting time on website loading from 1.5s to 3s. This seems a little bit high and I want to reduce it.
When I put my websites databases on localhost (where the apache is also) it opens very fast with waiting time in 100-500ms. Is there a way to do it?

Here is the ping from apache to database VM:

64 bytes from xxx.xxx.xxx.xxx: icmp_seq=1 ttl=63 time=0.374 ms  
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=2 ttl=63 time=0.953 ms  
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=3 ttl=63 time=0.369 ms  
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=4 ttl=63 time=0.630 ms  
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=5 ttl=63 time=0.278 ms  
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=6 ttl=63 time=0.408 ms  
64 bytes from xxx.xxx.xxx.xxx: icmp_seq=7 ttl=63 time=0.325 ms  

Mysql VM has 4 GB of RAM, and I have set mysql to use about 3 GB of it.
I have configured mysql with this options:

slow_query_log = 1  
slow_query_log_file = /var/log/mysql/slow_query.log  
long_query_time = 4  
max_allowed_packet = 12MB  
table_cache = 2048  
table_open_cache = 2048  
table_definition_cache = 2048  
sort_buffer_size = 4M  
join_buffer_size = 4M  
read_buffer_size = 4M  
read_rnd_buffer_size = 4M  
key_buffer_size = 128M  
myisam_sort_buffer_size = 128M  
thread_cache_size = 16  
query_cache_size= 128M  
query_cache_limit = 4M  
tmp_table_size = 512MB  
max_heap_table_size = 512MB  
innodb_buffer_pool_size = 800M  
innodb_additional_mem_pool_size = 128M  
innodb_log_file_size = 256M  
wait_timeout = 30  
interactive_timeout = 30  

How can I get rid of all this latency? Mysqltuner and tuning-primer scripts tells me that I have configured almost everything ok. But there is still high level of temp tables created on disk:
[!!] Temporary tables created on disk: 41% (893 on disk / 2K total).
How can I reduce this? Because it is shared hosting I don't know how much BLOB or TEXT fields are there in databases.

Or is there a way that I can connect these two VMs internally (not by public IP addresses, but also to remain public) so maybe that will improve performance?

If you need anything else I will post it (like mysqltuner report,....). Thanks in advance.

share|improve this question
You say that Apache is running on a virtual machine but also say that it's shared hosting. Perhaps you should explain that in more detail because as soon as I see "shared hosting" I see a situation where it's just about impossible to determine what resources are really available at any given point in time, particularly CPU power. –  John Gardeniers Aug 2 '12 at 11:43
Yes I meant what I said it is shared hosting. It runs apache. My customers put their websites there. And they put their databases on the other virtual machine. And this has nothing to do with CPU power at all. Server load is quite normal. I just got latency from network because my databases are on other VM that is on public IP. I solved it by creating virtual switch and connecting these two VMs on that vswitch. But thanks anyway. –  dennisg Aug 3 '12 at 12:12
If you've solved the problem you should post the solution as an answer. –  John Gardeniers Aug 3 '12 at 14:01

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