I need MySQL Optimizations

Hello! I have a dedicated server Intel i7 CPU 950@3.07GHz with 24GB RAM on CentOS 5.5 x86_64 and I need advice for tuning MySQL database (myisam and innodb) (ver. 5.0.95). I have a Joomla portal (myisam db) and database size is around 200 MB. CMS has 20-30000 inputs per day, and the problem happens when we let the links on Facebook page (70,000 fans about). Today I'm on FB published an interesting story about that server literally froze and I had to restart the database. Please give me some advise in the form of a template for a new and better configuration database (myisam and innodb) . Thank you very much, p.s: I'm sorry for my english :) MySQLTuner report:


[OK] Currently running supported MySQL version 5.0.95-log
[OK] Operating on 64-bit architecture

-------- Storage Engine Statistics -------------------------------------------
[--] Status: -Archive -BDB -Federated +InnoDB -ISAM -NDBCluster
[--] Data in MyISAM tables: 163M (Tables: 768)
[--] Data in InnoDB tables: 14M (Tables: 383)
[!!] Total fragmented tables: 21

-------- Security Recommendations -------------------------------------------
[OK] All database users have passwords assigned

-------- Performance Metrics -------------------------------------------------
[--] Up for: 30m 39s (448K q [244.105 qps], 7K conn, TX: 5B, RX: 75M)
[--] Reads / Writes: 90% / 10%
[--] Total buffers: 3.3G global + 4.2M per thread (800 max threads)
[OK] Maximum possible memory usage: 6.6G (28% of installed RAM)
[OK] Slow queries: 1% (5K/448K)
[!!] Highest connection usage: 100% (801/800)
[OK] Key buffer size / total MyISAM indexes: 2.9G/45.6M
[OK] Key buffer hit rate: 100.0% (71M cached / 8K reads)
[OK] Query cache efficiency: 51.2% (202K cached / 394K selects)
[!!] Query cache prunes per day: 45713
[OK] Sorts requiring temporary tables: 0% (83 temp sorts / 15K sorts)
[!!] Temporary tables created on disk: 45% (8K on disk / 18K total)
[OK] Thread cache hit rate: 89% (801 created / 7K connections)
[OK] Table cache hit rate: 99% (2K open / 2K opened)
[OK] Open file limit used: 25% (3K/12K)
[OK] Table locks acquired immediately: 98% (212K immediate / 216K locks)
[OK] InnoDB data size / buffer pool: 14.6M/32.0M

-------- Recommendations -----------------------------------------------------
General recommendations:
Run OPTIMIZE TABLE to defragment tables for better performance
MySQL started within last 24 hours - recommendations may be inaccurate
Reduce or eliminate persistent connections to reduce connection usage
Temporary table size is already large - reduce result set size
Reduce your SELECT DISTINCT queries without LIMIT clauses
Variables to adjust:
max_connections (> 800)
wait_timeout (< 28800)
interactive_timeout (< 28800)
query_cache_size (> 8M)

MySQL Performance Tuning primer

SLOW QUERIES
The slow query log is enabled.
Current long_query_time = 1 sec.
You have 5656 out of 475784 that take longer than 1 sec. to complete
Your long_query_time seems to be fine

BINARY UPDATE LOG
The binary update log is NOT enabled.
You will not be able to do point in time recovery
See /http://dev.mysql.com/doc/refman/5.0/...-recovery.html

WORKER THREADS
Current thread_cache_size = 200
Current threads_cached = 14
Current threads_per_sec = 0
Historic threads_per_sec = 0
Your thread_cache_size is fine

MAX CONNECTIONS
Current max_connections = 800
Current threads_connected = 400
Historic max_used_connections = 801
The number of used connections is 100% of the configured maximum.
You should raise max_connections

INNODB STATUS
Current InnoDB index space = 8 M
Current InnoDB data space = 14 M
Current InnoDB buffer pool free = 45 %
Current innodb_buffer_pool_size = 32 M
Depending on how much space your innodb indexes take up it may be safe
to increase this value to up to 2 / 3 of total system memory

MEMORY USAGE
Max Memory Ever Allocated : 6.35 G
Configured Max Per-thread Buffers : 3.32 G
Configured Max Global Buffers : 3.03 G
Configured Max Memory Limit : 6.35 G
Physical Memory : 23.53 G
Max memory limit seem to be within acceptable norms

KEY BUFFER
Current MyISAM index space = 45 M
Current key_buffer_size = 2.92 G
Key cache miss rate is 1 : 9081
Key buffer free ratio = 81 %
Your key_buffer_size seems to be fine

QUERY CACHE
Query cache is enabled
Current query_cache_size = 8 M
Current query_cache_used = 3 M
Current query_cache_limit = 1 M
Current Query cache Memory fill ratio = 39.80 %
Current query_cache_min_res_unit = 4 K
MySQL won't cache query results that are larger than query_cache_limit in size

SORT OPERATIONS
Current sort_buffer_size = 1 M
Current read_rnd_buffer_size = 1 M
Sort buffer seems to be fine

JOINS
Current join_buffer_size = 1.00 M
You have had 0 queries where a join could not use an index properly
Your joins seem to be using indexes properly

OPEN FILES LIMIT
Current open_files_limit = 12288 files
The open_files_limit should typically be set to at least 2x-3x
that of table_cache if you have heavy MyISAM usage.
Your open_files_limit value seems to be fine

TABLE CACHE
Current table_cache value = 4096 tables
You have a total of 1169 tables
You have 2757 open tables.
The table_cache value seems to be fine

TEMP TABLES
Current max_heap_table_size = 256 M
Current tmp_table_size = 256 M
Of 11184 temp tables, 45% were created on disk
Perhaps you should increase your tmp_table_size and/or max_heap_table_size
to reduce the number of disk-based temporary tables
Note! BLOB and TEXT columns are not allow in memory tables.
If you are using these columns raising these values might not impact your
ratio of on disk temp tables.

TABLE SCANS
Current read_buffer_size = 1 M
Current table scan ratio = 518 : 1
read_buffer_size seems to be fine

TABLE LOCKING
Current Lock Wait ratio = 1 : 42
You may benefit from selective use of InnoDB.

my.cnf


[mysqld]
local-infile=0
datadir=/var/lib/mysql
#skip-locking
skip-bdb
#skip-networking
safe-show-database
#query_cache_limit=4M
query_cache_size=8M
query_cache_type=1
max_connections=800
#interactive_timeout=10
#wait_timeout=20
#connect_timeout=20
thread_cache_size=200
key_buffer=3000M 
log-queries-not-using-indexes
join_buffer_size=1M
max_connect_errors=20
max_allowed_packet=32M
table_cache = 4096
tmp_table_size=256M
max_heap_table_size=256M
#bulk_insert_buffer_size=512M
thread_stack = 256K
sort_buffer_size = 1M
read_buffer_size = 1M
read_rnd_buffer_size = 1M
thread_concurrency=16 
myisam_sort_buffer_size=128M
myisam_max_sort_file_size=256M
myisam_repair_threads=4
server-id=1
log-slow-queries = /var/lib/mysql/mysql-slow.log
expire_logs_days=7
long_query_time = 1
low_priority_updates=1
concurrent_insert=2
open_files_limit=12288

innodb_buffer_pool_size=32M
innodb_additional_mem_pool_size=50M
innodb_file_io_threads=16
innodb_lock_wait_timeout=50
innodb_log_buffer_size=16M
innodb_flush_log_at_trx_commit = 2

[mysql.server]
user=mysql

[safe_mysqld]
err-log=/var/log/mysqld.log
pid-file=/var/lib/mysql/mysql.pid
open_files_limit=12288

[mysqldump]
quick
max_allowed_packet=32M

[mysql]
no-auto-rehash
#safe-updates

[isamchk]
key_buffer=64M
sort_buffer=64M
read_buffer=16M
write_buffer=16M

[myisamchk]
key_buffer=64M
sort_buffer=64M
read_buffer=16M
write_buffer=16M

[mysqlhotcopy]
interactive-timeout

I need MySQL Optimizations

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