Well, you’ve provided basically nothing as leads, so it is hard to tell what’s going on with just output of named -V.
I would suggest to recompile names with jemalloc enabled and then use jemalloc profiling to see where the memory goes. See https://www.isc.org/blogs/2023-BIND-memory-management-explained/ for more details (search for jeprof for tldr). Ondrej -- Ondřej Surý — ISC (He/Him) My working hours and your working hours may be different. Please do not feel obligated to reply outside your normal working hours. > On 18. 5. 2025, at 23:21, Philip Prindeville via bind-users > <bind-users@lists.isc.org> wrote: > > Hi, > > I’ve been running 9.20.7 on OpenWRT for over a year without issues. > Yesterday, however, it died because of OOM (out-of-memory) kill from the > kernel. > > I use it with isc-dhcp service for IPv4, and do split horizon for internal > domains. > > What I’ve noticed is that at startup I’m using about 33K pages as the VSZ > (per top on x86_64 hardware). > > Within a minute, however, that’s doubled to 72600+ pages. More than double. > > This is a small network with 1 domain (plus two rDNS domains), and not more > than 400 RR’s total. > > If I do an “rndc flush” is drops about 3000 pages, but slowly starts creeping > up again. > > I updated to 9.20.8 a few minutes ago but I’m still seeing the same issue. > > root@OpenWrt:~# named -V > BIND 9.20.8 (Stable Release) <id:> > running on Linux x86_64 6.6.41 #0 SMP Sat Jul 27 03:38:57 2024 > built by make with '--target=x86_64-openwrt-linux' > '--host=x86_64-openwrt-linux' '--build=x86_64-pc-linux-gnu' > '--disable-dependency-tracking' '--program-prefix=' '--program-suffix=' > '--prefix=/usr' '--exec-prefix=/usr' '--bindir=/usr/bin' > '--sbindir=/usr/sbin' '--libexecdir=/usr/lib' '--sysconfdir=/etc' > '--datadir=/usr/share' '--localstatedir=/var' '--mandir=/usr/man' > '--infodir=/usr/info' '--disable-geoip' > '--with-openssl=/home/philipp/lede/staging_dir/target-x86_64_musl/usr' > '--without-lmdb' '--without-readline' '--sysconfdir=/etc/bind' > '--with-json-c=no' '--with-libxml2=no' '--enable-doh' '--without-gssapi' > 'build_alias=x86_64-pc-linux-gnu' 'host_alias=x86_64-openwrt-linux' > 'target_alias=x86_64-openwrt-linux' 'CC=x86_64-openwrt-linux-musl-gcc' > 'CFLAGS=-Os -pipe -g3 -fno-caller-saves -fno-plt -fhonour-copts > -fmacro-prefix-map=/home/philipp/lede/build_dir/target-x86_64_musl/bind-9.20.8=bind-9.20.8 > -Wformat -Werror=format-security -fstack-protector -D_FORTIFY_SOURCE=1 > -Wl,-z,now -Wl,-z,relro ' > 'LDFLAGS=-L/home/philipp/lede/staging_dir/toolchain-x86_64_gcc-14.2.0_musl/usr/lib > -L/home/philipp/lede/staging_dir/toolchain-x86_64_gcc-14.2.0_musl/lib > -fuse-ld=bfd -znow -zrelro -Wl,--gc-sections,--as-needed ' > 'CPPFLAGS=-I/home/philipp/lede/staging_dir/toolchain-x86_64_gcc-14.2.0_musl/usr/include > -I/home/philipp/lede/staging_dir/toolchain-x86_64_gcc-14.2.0_musl/include > -I/home/philipp/lede/staging_dir/toolchain-x86_64_gcc-14.2.0_musl/include/fortify > ' 'PKG_CONFIG=/home/philipp/lede/staging_dir/host/bin/pkg-config' > 'PKG_CONFIG_PATH=/home/philipp/lede/staging_dir/target-x86_64_musl/usr/lib/pkgconfig:/home/philipp/lede/staging_dir/target-x86_64_musl/usr/share/pkgconfig' > > 'PKG_CONFIG_LIBDIR=/home/philipp/lede/staging_dir/target-x86_64_musl/usr/lib/pkgconfig:/home/philipp/lede/staging_dir/target-x86_64_musl/usr/share/pkgconfig' > compiled by GCC 14.2.0 > compiled with OpenSSL version: OpenSSL 3.0.16 11 Feb 2025 > linked to OpenSSL version: OpenSSL 3.0.14 4 Jun 2024 > compiled with libuv version: 1.48.0 > linked to libuv version: 1.48.0 > compiled with liburcu version: 0.15.2 > compiled with libnghttp2 version: 1.63.0 > linked to libnghttp2 version: 1.62.1 > compiled with zlib version: 1.3.1 > linked to zlib version: 1.3.1 > threads support is enabled > DNSSEC algorithms: RSASHA1 NSEC3RSASHA1 RSASHA256 RSASHA512 ECDSAP256SHA256 > ECDSAP384SHA384 ED25519 ED448 > DS algorithms: SHA-1 SHA-256 SHA-384 > HMAC algorithms: HMAC-MD5 HMAC-SHA1 HMAC-SHA224 HMAC-SHA256 HMAC-SHA384 > HMAC-SHA512 > TKEY mode 2 support (Diffie-Hellman): no > TKEY mode 3 support (GSS-API): no > > default paths: > named configuration: /etc/bind/named.conf > rndc configuration: /etc/bind/rndc.conf > nsupdate session key: /var/run/named/session.key > named PID file: /var/run/named/named.pid > root@OpenWrt:~# > > What would explain the sudden increase in memory usage when the environment > has been relatively static? > > Thanks, > > -Philip > > > > -- > Visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from > this list > > ISC funds the development of this software with paid support subscriptions. > Contact us at https://www.isc.org/contact/ for more information. > > > bind-users mailing list > bind-users@lists.isc.org > https://lists.isc.org/mailman/listinfo/bind-users
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