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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Dear Users,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I have a low end server with 1 GB of RAM running GNU/Linux version 3.4.104. I noticed that after a certain time the swap space is extensively used. This is normally not an issue but sometimes the system has long response times. I noticed that “named” is using a lot of memory. So I add the following lines in the options section of bind.conf<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='font-family:"Courier New"'> max-cache-size 629145600 ;<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> cleaning-interval 120 ; // 2 hours<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> max-cache-ttl 14400 ; // 4 hours<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'> max-ncache-ttl 14400 ; // 4 hours<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>But this does not help. I thought that bind would not use much more than 600 kB, but this is not true. When I look with “top” I see<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='font-family:"Courier New"'> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'>32470 bind 20 0 982m 842m 2260 S 0.0 86.8 175:55.22 named<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>As you can see “named” is using 842 MB physical and 982 MB virtual memory. Much more than configured. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>On this server I have bind version <o:p></o:p></p><p class=MsoNormal><span style='font-family:"Courier New"'>BIND 9.10.3 <id:2799933><o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'>built by make with '--enable-shared' '--enable-static' '--enable-ipv6' '--with-openssl' 'CC=gcc' 'LDFLAGS=-L/usr/lib/arm-linux-gnueabihf'<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'>compiled by GCC 4.6.3<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>On a different system ( same kernel version, same HW ) I am using BIND 9.9.5<o:p></o:p></p><p class=MsoNormal>Here I never noticed this issue. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Is there a major change for memory management in version 9.10 ? <o:p></o:p></p><p class=MsoNormal>Are there any other methods to reduce memory consumption for bind ? <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Kind regards <o:p></o:p></p><p class=MsoNormal>Hans<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>