Подскажите в оптимизации MySQL

MySQL Version 5.1.66-0+squeeze1 x86_64

Uptime = 42 days 4 hrs 45 min 31 sec
Avg. qps = 127
Total Questions = 464154165
Threads Connected = 3

Server has been running for over 48hrs.
It should be safe to follow these recommendations

To find out more information on how each of these
runtime variables effects performance visit:
http://dev.mysql.com/doc/refman/5.1/en/server-system-variables.html
Visit http://www.mysql.com/products/enterprise/advisors.html
for info about MySQL's Enterprise Monitoring and Advisory Service

SLOW QUERIES
The slow query log is enabled.
Current long_query_time = 10.000000 sec.
You have 6029261 out of 464154285 that take longer than 10.000000 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/5.1/en/point-in-time-recovery.html

WORKER THREADS
Current thread_cache_size = 8
Current threads_cached = 7
Current threads_per_sec = 0
Historic threads_per_sec = 0
Your thread_cache_size is fine

MAX CONNECTIONS
Current max_connections = 600
Current threads_connected = 3
Historic max_used_connections = 404
The number of used connections is 67% of the configured maximum.
Your max_connections variable seems to be fine.

No InnoDB Support Enabled!

MEMORY USAGE
Max Memory Ever Allocated : 6.90 G
Configured Max Per-thread Buffers : 7.28 G
Configured Max Global Buffers : 2.00 G
Configured Max Memory Limit : 9.28 G
Physical Memory : 7.71 G

Max memory limit exceeds 90% of physical memory

KEY BUFFER
Current MyISAM index space = 7.25 G
Current key_buffer_size = 1.50 G
Key cache miss rate is 1 : 317
Key buffer free ratio = 2 %
You could increase key_buffer_size
It is safe to raise this up to 1/4 of total system memory;
assuming this is a dedicated database server.

QUERY CACHE
Query cache is enabled
Current query_cache_size = 512 M
Current query_cache_used = 443 M
Current query_cache_limit = 16 M
Current Query cache Memory fill ratio = 86.64 %
Current query_cache_min_res_unit = 2 K
However, 39779795 queries have been removed from the query cache due to lack of memory
Perhaps you should raise query_cache_size
MySQL won't cache query results that are larger than query_cache_limit in size

SORT OPERATIONS
Current sort_buffer_size = 8 M
Current read_rnd_buffer_size = 256 K
Sort buffer seems to be fine

JOINS
Current join_buffer_size = 2.00 M
You have had 420 queries where a join could not use an index properly
You should enable "log-queries-not-using-indexes"
Then look for non indexed joins in the slow query log.
If you are unable to optimize your queries you may want to increase your
join_buffer_size to accommodate larger joins in one pass.

Note! This script will still suggest raising the join_buffer_size when
ANY joins not using indexes are found.

OPEN FILES LIMIT
Current open_files_limit = 10650 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_open_cache = 30000 tables
Current table_definition_cache = 4096 tables
You have a total of 2351 tables
You have 3505 open tables.
The table_cache value seems to be fine

TEMP TABLES
Current max_heap_table_size = 1.00 G
Current tmp_table_size = 1.00 G
Of 1224096 temp tables, 3% were created on disk
Created disk tmp tables ratio seems fine

TABLE SCANS
Current read_buffer_size = 2 M
Current table scan ratio = 2089 : 1
read_buffer_size seems to be fine

TABLE LOCKING
Current Lock Wait ratio = 1 : 11227
Your table locking seems to be fine