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| author | Tim Ruffing <crypto@timruffing.de> | 2023-09-20 17:12:24 +0000 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2023-09-20 17:12:24 +0000 |
| commit | 12f7257b8f6ba0de1fb05b598e916c8b14bcab8c (patch) | |
| tree | 9e9f3586f74ed206a6d3a4ef4bdad608bc3fb16c /doc | |
| parent | 99ce8366ed949a1e8a42c1562867b0330b78b212 (diff) | |
doc: Be vague instead of wrong about MALLOC_ARENA_MAX
Before this commit, we claim that glibc's malloc implementation uses 2
arenas by default. But that's true only on 32-bit systems, and even
there, it uses *up* to 2 arenas.
This commit fixes the wrong statement. The new statement is
intentionally vague to reduce our maintenance burden.
For details, see:
https://www.gnu.org/software/libc/manual/html_node/Memory-Allocation-Tunables.html#index-glibc_002emalloc_002earena_005fmax
Noticed in:
https://github.com/bitcoin/bitcoin/pull/27642#issuecomment-1728103427
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/reduce-memory.md | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/doc/reduce-memory.md b/doc/reduce-memory.md index dbe88d45f3..2710797ef3 100644 --- a/doc/reduce-memory.md +++ b/doc/reduce-memory.md @@ -43,7 +43,7 @@ threads take up 8MiB for the thread stack on a 64-bit system, and 4MiB in a ## Linux specific -By default, glibc will create up to two heap arenas per core. This is known to cause excessive memory usage in some scenarios. To avoid this make a script that sets `MALLOC_ARENA_MAX` before starting bitcoind: +By default, glibc's implementation of `malloc` may use more than one arena. This is known to cause excessive memory usage in some scenarios. To avoid this, make a script that sets `MALLOC_ARENA_MAX` before starting bitcoind: ```bash #!/usr/bin/env bash |