ebpfbased distributed tracing in Envoy: Fix Leaks & Overhead

The 03:14 AM OOM Sweep [Wed Oct 18 03:14:02 2023] oom-killer: gfp_mask=0x140cca(GFP_HIGHUSER_MOVABLE|__GFP_COMP), order=0, oom_score_adj=900 [Wed Oct 18 03:14:02 2023] CPU: 37 PID: 14892 Comm: envoy Kdump: nullptr Tainted: G OE 5.15.0-88-generic #98-Ubuntu [Wed Oct 18 03:14:02 2023] Mem-Total: 32901416kB, AnonPages: 29841904kB, Shmem: 11232kB, Slab: 412091kB [Wed Oct 18 03:14:02 2023] Active(anonymous): 18402912 Inactive: 11419024 Isolated:₀ … Read more