global mysql_options mysql_options = os.getenv('DSTAT_MYSQL') class dstat_plugin(dstat): def __init__(self): self.name = 'mysql io' self.nick = ('recv', 'sent') self.vars = ('Bytes_received', 'Bytes_sent') def check(self): if not os.access('/usr/bin/mysql', os.X_OK): raise Exception, 'Needs MySQL binary' try: self.stdin, self.stdout, self.stderr = dpopen('/usr/bin/mysql -n %s' % mysql_options) except IOError: raise Exception, 'Cannot interface with MySQL binary' def extract(self): try: self.stdin.write("show status like 'Bytes_%';\n") for line in readpipe(self.stdout): l = line.split() if len(l) < 2: continue if l[0] in self.vars: self.set2[l[0]] = float(l[1]) for name in self.vars: self.val[name] = (self.set2[name] - self.set1[name]) * 1.0 / elapsed if step == op.delay: self.set1.update(self.set2) except IOError, e: if op.debug > 1: print '%s: lost pipe to mysql, %s' % (self.filename, e) for name in self.vars: self.val[name] = -1 except Exception, e: if op.debug > 1: print 'dstat_innodb_buffer: exception', e for name in self.vars: self.val[name] = -1 # vim:ts=4:sw=4:et

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