One extra info, for both,

Wich are the DB size each of you have?
I have 120GB now, InnoDB, with file_per_table.

Jorge,s

> we are using compressed tables since 2009 / MySQL 5.1 in 5.1 you needed
> innodb_plugin, 5.5 supports native
> 
> be aware you need "innodb_file_per_table" for this feature
> 
> innodb_buffer_pool_size                 = 3072M
> innodb_buffer_pool_instances            = 3
> innodb_purge_threads                    = 1
> innodb_max_purge_lag                    = 200000
> innodb_max_dirty_pages_pct              = 60
> innodb_additional_mem_pool_size         = 64M
> innodb_log_file_size                    = 512M
> innodb_log_buffer_size                  = 256M
> innodb_thread_concurrency               = 32
> innodb_thread_sleep_delay               = 10
> innodb_flush_log_at_trx_commit          = 2
> innodb_support_xa                       = 1
> innodb_lock_wait_timeout                = 50
> innodb_table_locks                      = 0
> innodb_checksums                        = 0
> innodb_file_format                      = barracuda
> innodb_file_per_table                   = 1
> innodb_open_files                       = 600
> innodb_io_capacity                      = 300
> innodb_read_io_threads                  = 8
> innodb_write_io_threads                 = 8
> transaction-isolation                   = READ-COMMITTED


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