Urgent Help Needed, getting DUgg and Slashdotted

P

piper

Well-Known Member
#1
#1
I'm getting around 10000 unique/hour at this moment and my server is hardly responding. I'm using Wordpress 2.2

Here is my setting :

Max Connections 1400
Max SSL Connections 200
Connection Timeout (secs) 150
Max Keep-Alive Requests 700
Smart Keep-Alive Yes
Keep-Alive Timeout (secs) 5
Send Buffer Size (bytes) 0
Receive Buffer Size (bytes) 0
I/O Event Dispatcher poll (All platforms)
Max Cached Small File Size (bytes) 4096
Total Small File Cache Size (bytes) 20M
Max MMAP File Size (bytes) 256K
Total MMAP Cache Size (bytes) 40M
Use sendfile() Not Set
SSL Hardware Accelerator (built-in) OpenSSL internal engine
Request/Response Edit
Max Request URL Length (bytes) 8192
Max Request Header Size (bytes) 16380
Max Request Body Size (bytes) 10M
Max Dynamic Response Header Size (bytes) 4K
Max Dynamic Response Body Size (bytes) 10M


when i run top -i

9438 gear 18 0 58456 25m 13m R 26 1.2 0:01.40 lsphp
9463 gear 19 0 51872 12m 7560 R 22 0.6 0:00.40 lsphp
9415 gear 19 0 51140 17m 13m R 21 0.9 0:01.80 lsphp
9442 gear 25 0 56996 21m 12m R 16 1.1 0:00.93 lsphp
9449 gear 23 0 54928 17m 9.9m R 16 0.9 0:00.68 lsphp
9464 gear 19 0 51352 10m 6592 R 16 0.5 0:00.30 lsphp
9439 gear 25 0 57540 23m 13m R 15 1.2 0:01.07 lsphp
9417 gear 17 0 50864 17m 13m R 14 0.9 0:01.38 lsphp
9420 gear 17 0 50864 17m 13m R 14 0.9 0:01.46 lsphp
9426 gear 17 0 50864 17m 13m R 14 0.9 0:01.44 lsphp
9459 gear 22 0 51092 9292 5740 R 12 0.4 0:00.22 lsphp
9450 gear 23 0 54928 18m 10m R 11 0.9 0:00.73 lsphp
9440 gear 22 0 16192 6144 4124 R 8 0.3 0:00.75 lsphp
9445 gear 23 0 55960 19m 10m R 6 1.0 0:00.78 lsphp
9447 gear 21 0 53040 14m 8724 R 6 0.7 0:00.50 lsphp
9428 gear 20 0 58456 25m 13m R 5 1.2 0:01.40 lsphp
9441 gear 23 0 54080 16m 9316 R 5 0.8 0:00.57 lsphp
9443 gear 21 0 53040 14m 8604 R 5 0.7 0:00.50 lsphp
9448 gear 25 0 51352 11m 6828 R 5 0.5 0:00.30 lsphp
9422 gear 16 0 50084 16m 13m R 4 0.8 0:01.26 lsphp
9467 slashp 21 0 48596 5116 3516 R 2 0.2 0:00.04 lsphp
9411 nobody 22 0 8004 4856 1796 R 1 0.2 0:00.21 lshttpd
9456 root 16 0 1972 1000 764 R 1 0.0 0:00.04 top
4531 nobody 18 3 26364 22m 11m R 1 1.1 10:11.30 lshttpd
9432 gear 25 0 57516 23m 13m R 1 1.2 0:01.03 lsphp
9427 gear 25 0 57256 22m 12m R 0 1.1 0:00.99 lsphp
9446 nobody 28 3 26364 11m 148 R 0 0.5 0:00.00 lshttpd
9451 nobody 28 3 26364 11m 148 R 0 0.5 0:00.00 lshttpd
9452 nobody 28 3 26364 11m 148 R 0 0.5 0:00.00 lshttpd

Server COnfig

Dual Xeon 3.0Ghz
4GB DDR RAm
2 X 74GB 10k RPM SCSI
RHEL 4
Using Litespeed 3.11 Enterprise
PHP 5.22/APC (latest)
and LSAPI 4.0

Please assist , thanks in advanced
 
M

mistwang

LiteSpeed Staff
#2
#2
You should use "epoll" instead of "poll" and turn on "sendfile" if you server also serve static files.
Consider to install wp-cache to avoid generating the page again and agin.
What is the "max connection" for lsphp? do not set it too large to have your server start to use swap.
 
P

piper

Well-Known Member
#3
#3
WP-cache does not work with 2.2, it generates cache but wont serve it

here is my setting for lsphp

Max Connections 20
Environment PHP_LSAPI_MAX_REQUESTS=500
Initial Request Timeout (secs) 60
Retry Timeout (secs) 0
Persistent Connection Not Set
Connection Keepalive Timeout Not Set
Response Buffering No
Auto Start Yes
Command $SERVER_ROOT/fcgi-bin/lsphp -c /opt/phpconf
Back Log 100
Instances 20
Run On Start Up Not Set
Max Idle Time Not Set
Priority 0
Memory Soft Limit (bytes) 80M
Memory Hard Limit (bytes) 100M
Process Soft Limit 250
Process Hard Limit 250


Thanks
 
M

mistwang

LiteSpeed Staff
#4
#4
Have you tried memcached to cache some part of your page to avoid querying the DB again and again?
What is your current memory usage as shown in "top" ouput?
From the real time report of LiteSpeed web console, what's requests/s of your server and lsphp application? Please post the statistic information of lsphp.
 
P

piper

Well-Known Member
#5
#5
memory is 3.9GB out of 4Gb being used

I used APC, can i use them with memcache?

as for litespeed it's
Server Load RAM Usage CPU Usage Requests/Sec Traffic In/Sec Traffic Out/Sec
7.71 31.0MB 3.0% 69 24KB 960KB
 
M

mistwang

LiteSpeed Staff
#6
#6
You need to exclue the cache and buffer memory from used memory.
Do you mean that you use APC as an object cache inaddition to opcode cache?
If your PHP was built with memcache extension, you should be able to use it.

I need the lsphp application statistics at the bottom of the report page.
 
M

mistwang

LiteSpeed Staff
#14
#14
Increased load does not matter much, and it is normal to get higher load when you increase it. There is a sweet spot somewhere. Just do not overtune it.
That's pretty much what can be done from litespeed side, you can continue to improve your PHP script in order to get better performance out of it. :)
 
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