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50 lines
1.6 KiB
D
50 lines
1.6 KiB
D
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#!/usr/sbin/dtrace -s
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#
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# Shows the time that an individual lock is applied to a database and table
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# Shows the time to achieve the lock, and the time the table was locked
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o#pragma D option quiet
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mysql*:::handler-rdlock-start
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{
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self->rdlockstart = timestamp;
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this->lockref = strjoin(copyinstr(arg0),strjoin("@",copyinstr(arg1)));
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self->lockmap[this->lockref] = self->rdlockstart;
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printf("Start: Lock->Read %s.%s\n",copyinstr(arg0),copyinstr(arg1));
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}
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mysql*:::handler-wrlock-start
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{
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self->wrlockstart = timestamp;
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this->lockref = strjoin(copyinstr(arg0),strjoin("@",copyinstr(arg1)));
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self->lockmap[this->lockref] = self->rdlockstart;
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printf("Start: Lock->Write %s.%s\n",copyinstr(arg0),copyinstr(arg1));
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}
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mysql*:::handler-unlock-start
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{
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self->unlockstart = timestamp;
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this->lockref = strjoin(copyinstr(arg0),strjoin("@",copyinstr(arg1)));
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printf("Start: Lock->Unlock %s.%s (%d ms lock duration)\n",
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copyinstr(arg0),copyinstr(arg1),
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(timestamp - self->lockmap[this->lockref])/1000000);
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}
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mysql*:::handler-rdlock-done
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{
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printf("End: Lock->Read %d ms\n",
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(timestamp - self->rdlockstart)/1000000);
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}
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mysql*:::handler-wrlock-done
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{
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printf("End: Lock->Write %d ms\n",
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(timestamp - self->wrlockstart)/1000000);
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}
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mysql*:::handler-unlock-done
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{
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printf("End: Lock->Unlock %d ms\n",
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(timestamp - self->unlockstart)/1000000);
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}
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