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Diffstat (limited to 'contrib/tracing/README.md')
| -rw-r--r-- | contrib/tracing/README.md | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/contrib/tracing/README.md b/contrib/tracing/README.md index 05d2c8f9cf..a409a23ef8 100644 --- a/contrib/tracing/README.md +++ b/contrib/tracing/README.md @@ -262,7 +262,13 @@ uncached from the UTXO set. Based on the `utxocache:add`, `utxocache:spend` and $ bpftrace contrib/tracing/log_utxos.bt ``` -It should produce an output similar to the following. +This should produce an output similar to the following. If you see bpftrace +warnings like `Lost 24 events`, the eBPF perf ring-buffer is filled faster +than it is being read. You can increase the ring-buffer size by setting the +ENV variable `BPFTRACE_PERF_RB_PAGES` (default 64) at a cost of higher +memory usage. See the [bpftrace reference guide] for more information. + +[bpftrace reference guide]: https://github.com/iovisor/bpftrace/blob/master/docs/reference_guide.md#98-bpftrace_perf_rb_pages ```bash Attaching 4 probes... |