onstat -p Funny

OS: Solaris 9 Everything is working fine, no problems as far I can tell then all of a sudden our monitoring picks up a read cache drop and I get the following onstat -p. The DBserver is for a website, traffic levels haven't changed, and there are no background jobs, and I'm seeing very little disk activity but the cache still reads 0%. The stats have not be cleared down Any ideas informix: onstat -p Informix Dynamic Server Version 9.40.UC1 -- On-Line -- Up 17 days 22:08:25 -- 2493440 Kbytes Profile dskreads pagreads bufreads %cached dskwrits pagwrits bufwrits %cached 194114421 312676058 177660467 0.00 39720009 67800818 485224646 91.81 isamtot open start read write rewrite delete commit rollbk 827519294 710678029 1555618190 1316756590 153621187 53758451 29505132 19735797 4021 gp_read gp_write gp_rewrt gp_del gp_alloc gp_free gp_curs 26 0 0 0 0 0 0 ovlock ovuserthread ovbuff usercpu syscpu numckpts flushes 7 0 0 699372.01 77315.73 1378 3785 bufwaits lokwaits lockreqs deadlks dltouts ckpwaits compress seqscans 10238808 14188 2996100352 0 0 1737 2063363 1506506 ixda-RA idx-RA da-RA RA-pgsused lchwaits 9209658 16758888 27476541 51934399 6011213 -- Paul Watson # Oninit Ltd # Growing old is mandatory Tel: +44 1436 672201 # Growing up is optional Fax: +44 1436 678693 # Mob: +44 7818 003457 # www.oninit.com #