[TYPO3] oversized cache tables

[Frank Sonck]

Hello list,

I have some tables in my database that are growing too much, specifically 
cache tables. What is the best practice for this? Can I just empty them 
every now and then?

Thanx,
Frank Sonck

cache_extensions    	11.878  	MyISAM   	4,7 MB   
cache_hash   		1.188 	 	MyISAM  	26,2 MB 
cache_imagesizes   	30.426 	 	MyISAM  	5,3 MB 
cache_md5params   	3.019.606 	MyISAM  	423,8 MB 	
cache_pages   		1.317 	 	MyISAM		36,4 MB 
cache_pagesection   	205 	 	MyISAM  	1,1 MB 	   
cache_sys_dmail_stat   	46.640 	 	MyISAM  	4,8 MB 
cache_typo3temp_log  	0