Hi list, my buster is using more and more memory until the oom-killer is invoked. This occurs after two days of uptime, but no process is using that memory. Slab seems suspicious to me.
Kernel: 4.19.37-5+deb10u1 (2019-07-19) x86_64 from /proc/meminfo after 8 hours uptime: MemTotal: 4041116 kB MemFree: 3165992 kB MemAvailable: 3246560 kB Buffers: 30144 kB Cached: 240356 kB SwapCached: 0 kB Active: 162056 kB Inactive: 144268 kB SwapTotal: 4194300 kB SwapFree: 4194300 kB Slab: 521364 kB SReclaimable: 66776 kB SUnreclaim: 454588 kB My Top 5 in slabtop: $ sudo slabtop --sort c --once | head -n12 Active / Total Objects (% used) : 2234301 / 2270100 (98,4%) Active / Total Slabs (% used) : 70832 / 70832 (100,0%) Active / Total Caches (% used) : 98 / 124 (79,0%) Active / Total Size (% used) : 501034,52K / 509459,17K (98,3%) Minimum / Average / Maximum Object : 0,01K / 0,22K / 8,00K OBJS ACTIVE USE OBJ SIZE SLABS OBJ/SLAB CACHE SIZE NAME 307534 304741 99% 0,20K 16186 19 64744K vm_area_struct 14280 14274 99% 3,69K 1785 8 57120K task_struct 178048 152224 85% 0,25K 11128 16 44512K filp 8536 8536 100% 4,00K 1067 8 34144K kmalloc-4096 14640 14640 100% 2,06K 976 15 31232K sighand_cache Active / Total Size is growing continually about 60 MB per hour. How can I detect what is eating up my memory in SUnreclaim (slab unreclaimable)? Thanks in advance Matthias Böttcher
