From 171f3d896908aac2e85007ea69166a75e90f2c40 Mon Sep 17 00:00:00 2001
From: Wiebe Cazemier <wiebe@halfgaar.net>
Date: Sat, 30 Jul 2022 16:16:20 +0200
Subject: [PATCH] Set systemd LimitNOFILE to infinite

---
 debian/flashmq.service | 2 +-
 mainapp.cpp            | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/debian/flashmq.service b/debian/flashmq.service
index b31b551..b7be944 100644
--- a/debian/flashmq.service
+++ b/debian/flashmq.service
@@ -6,7 +6,7 @@ After=network.target
 Type=simple
 User=root
 Group=root
-LimitNOFILE=1000000
+LimitNOFILE=infinity
 ExecStart=/usr/bin/FlashMQ --config-file /etc/flashmq/flashmq.conf
 ExecReload=/bin/kill -HUP $MAINPID
 Restart=on-failure
diff --git a/mainapp.cpp b/mainapp.cpp
index d80d5d3..15e3eaa 100644
--- a/mainapp.cpp
+++ b/mainapp.cpp
@@ -707,7 +707,8 @@ void MainApp::setlimits()
     struct rlimit v = { nofile, nofile };
     if (setrlimit(RLIMIT_NOFILE, &v) < 0)
     {
-        logger->logf(LOG_ERR, "Setting ulimit nofile failed: '%s'. This means the default is used.", strerror(errno));
+        logger->logf(LOG_ERR, "Setting ulimit nofile failed: '%s'. This means the default is used. Note. It's also subject to systemd's 'LimitNOFILE', "
+                              "which in turn is maxed to '/proc/sys/fs/nr_open', which can be set like 'sysctl fs.nr_open=15000000'", strerror(errno));
     }
 }
 
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libgit2 0.21.4