MarcJHuber
High RAM Usage
Hi Marc
Initially, I used the server to authenticate routers and switches. Later on, we added more devices, including OLTs, and I noticed that RAM usage started to overflow. For now, this issue is temporarily resolved by restarting the tac_plus service, but after some time, memory usage gradually returns to 100%.
@svrtacacsldap-master:~# cat /etc/os-release
PRETTY_NAME="Ubuntu 24.04.1 LTS"
NAME="Ubuntu"
VERSION_ID="24.04"
VERSION="24.04.1 LTS (Noble Numbat)"
VERSION_CODENAME=noble
ID=ubuntu
ID_LIKE=debian
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
UBUNTU_CODENAME=noble
LOGO=ubuntu-logo
root@svrtacacsldap-master:~# lscpu
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Address sizes: 40 bits physical, 48 bits virtual
Byte Order: Little Endian
CPU(s): 4
On-line CPU(s) list: 0-3
Vendor ID: GenuineIntel
BIOS Vendor ID: QEMU
Model name: Common KVM processor
BIOS Model name: pc-i440fx-9.2 CPU @ 2.0GHz
BIOS CPU family: 1
CPU family: 15
Model: 6
Thread(s) per core: 1
Core(s) per socket: 4
Socket(s): 1
Stepping: 1
BogoMIPS: 4799.99
Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr
pge mca cmov pat pse36 clflush mmx fxsr sse sse
2 ht syscall nx lm constant_tsc nopl xtopology c
puid tsc_known_freq pni cx16 x2apic hypervisor l
ahf_lm cpuid_fault pti
Virtualization features:
Hypervisor vendor: KVM
Virtualization type: full
Caches (sum of all):
L1d: 128 KiB (4 instances)
L1i: 128 KiB (4 instances)
L2: 16 MiB (4 instances)
L3: 16 MiB (1 instance)
NUMA:
NUMA node(s): 1
NUMA node0 CPU(s): 0-3
Vulnerabilities:
Gather data sampling: Not affected
Itlb multihit: KVM: Mitigation: VMX unsupported
L1tf: Mitigation; PTE Inversion
Mds: Vulnerable: Clear CPU buffers attempted, no micr
ocode; SMT Host state unknown
Meltdown: Mitigation; PTI
Mmio stale data: Unknown: No mitigations
Reg file data sampling: Not affected
Retbleed: Not affected
Spec rstack overflow: Not affected
Spec store bypass: Vulnerable
Spectre v1: Mitigation; usercopy/swapgs barriers and __user
pointer sanitization
Spectre v2: Mitigation; Retpolines; STIBP disabled; RSB fill
ing; PBRSB-eIBRS Not affected; BHI Retpoline
Srbds: Not affected
Tsx async abort: Not affected
root@svrtacacsldap-master:~# free -m
total used free shared buff/cache available
Mem: 3915 476 3351 0 306 3438
Swap: 3914 55 3859
root@svrtacacsldap-master:~#
root@svrtacacsldap-master:~# df -h
Filesystem Size Used Avail Use% Mounted on
tmpfs 392M 700K 391M 1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv 24G 11G 12G 49% /
tmpfs 2.0G 0 2.0G 0% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
/dev/sda2 2.0G 183M 1.7G 10% /boot
tmpfs 392M 12K 392M 1% /run/user/1001
tmpfs 392M 12K 392M 1% /run/user/1000
Hi,
thanks for reporting. Could you provide a minimalist configuration file that would allow me to reproduce this issue? Also, please share the "tac_plus-ng -v" output.
To isolate this issue further, does it also happen without
- file logging?
- DNS lookups?
- MAVIS lookups?
Thanks,
Marc
I'm closing this issue, please open a new one if there's still a problem with the current GIT.