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fix(rocksdb): set max_open_files to prevent fd exhaustion (#22005)

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Co-authored-by: Amp <amp@ampcode.com>
This commit is contained in:
Georgios Konstantopoulos
2026-02-09 17:32:48 -05:00
committed by GitHub
parent ccd15e8a25
commit 366857559b
1 changed files with 11 additions and 0 deletions
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11
crates/storage/provider/src/providers/rocksdb/provider.rs
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@@ -111,6 +111,15 @@ const DEFAULT_BLOCK_SIZE: usize = 16 * 1024;
/// Default max background jobs for `RocksDB` compaction and flushing.
const DEFAULT_MAX_BACKGROUND_JOBS: i32 = 6;
/// Default max open file descriptors for `RocksDB`.
///
/// Caps the number of SST file handles `RocksDB` keeps open simultaneously.
/// Set to 512 to stay within the common default OS `ulimit -n` of 1024,
/// leaving headroom for MDBX, static files, and other I/O.
/// `RocksDB` uses an internal table cache and re-opens files on demand,
/// so this has negligible performance impact on read-heavy workloads.
const DEFAULT_MAX_OPEN_FILES: i32 = 512;
/// Default bytes per sync for `RocksDB` WAL writes (1 MB).
const DEFAULT_BYTES_PER_SYNC: u64 = 1_048_576;
@@ -203,6 +212,8 @@ impl RocksDBBuilder {
options.set_log_level(log_level);
options.set_max_open_files(DEFAULT_MAX_OPEN_FILES);
// Delete obsolete WAL files immediately after all column families have flushed.
// Both set to 0 means "delete ASAP, no archival".
options.set_wal_ttl_seconds(0);