From 5389884ecfd56971f1d3d057c82e7aeb55cde156 Mon Sep 17 00:00:00 2001
From: kdeme <kim.demey@gmail.com>
Date: Tue, 16 Jul 2019 15:57:28 +0200
Subject: [PATCH] Add max open files limit of 512 to rocksdb init

---
 eth/trie/backends/rocksdb_backend.nim | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/eth/trie/backends/rocksdb_backend.nim b/eth/trie/backends/rocksdb_backend.nim
index 0f7aa7c..94c43ab 100644
--- a/eth/trie/backends/rocksdb_backend.nim
+++ b/eth/trie/backends/rocksdb_backend.nim
@@ -7,6 +7,10 @@ type
 
   ChainDB* = RocksChainDB
 
+# Maximum open files for rocksdb, set to 512 to be safe for usual 1024 Linux
+# limit per application
+const maxOpenFiles = 512
+
 proc get*(db: ChainDB, key: openarray[byte]): seq[byte] =
   let s = db.store.getBytes(key)
   if s.ok:
@@ -44,7 +48,8 @@ proc newChainDB*(basePath: string, readOnly = false): ChainDB =
   createDir(dataDir)
   createDir(backupsDir)
 
-  let s = result.store.init(dataDir, backupsDir, readOnly)
+  let s = result.store.init(dataDir, backupsDir, readOnly,
+                            maxOpenFiles = maxOpenFiles)
   if not s.ok: raiseStorageInitError()
 
   if not readOnly: