Date: Tue, 20 Jul 2004 12:42:15 +0200 From: "jesk" <jesk@killall.org> To: <freebsd-current@freebsd.org> Subject: I/O or Threading Suffer Message-ID: <028601c46e46$38fc9560$45fea8c0@turbofresse>
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hello, i got problems with mysql under freebsd 5.2.1 and CURRENT. i got these problems on two machines with different hardware, but both are single cpu machines. used scheduler is ULE. problem description: under high i/o load the mysqld isnt responding any more. i tested this with dd if=/dev/urandom of=testfile bs=128k on the hdd an was not able to become any ouput from simple select-statements within a long period of time (above minutes). i dont know if this problem occurs from mysql and its threads or if the i/o subsystem has any problems to deal fast enough with two intensives read and write processes and its priorities. best regards, christian
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