Lower process priority when saving login/char databases

In the event of CPU contention this will make forked database writes
take a back-seat to the actual running server.

2 files changed, 14 insertions, 1 deletions

diff --git a/src/char/char.cpp b/src/char/char.cpp
index 55dca81..04e540b 100644
--- a/src/char/char.cpp
+++ b/src/char/char.cpp
@@ -7,6 +7,8 @@
 #include <netdb.h>
 #include <unistd.h>
 
+#include <sys/resource.h>
+
 #include <cassert>
 #include <cstdlib>
 #include <cstring>
@@ -555,8 +557,13 @@ void mmo_char_sync_timer(TimerData *, tick_t)
 
     // This can take a lot of time. Fork a child to handle the work and return at once
     // If we're unable to fork just continue running the function normally
-    if ((pid = fork()) > 0)
+    if ((pid = fork()) > 0) {
         return;
+    }
+
+    // If we're a child, run as a lower priority process
+    if (pid == 0)
+        setpriority(PRIO_PROCESS, getpid(), 10);
 
     mmo_char_sync();
     inter_save();
diff --git a/src/login/login.cpp b/src/login/login.cpp
index ea58669..b21b028 100644
--- a/src/login/login.cpp
+++ b/src/login/login.cpp
@@ -5,6 +5,8 @@
 #include <netdb.h>
 #include <unistd.h>
 
+#include <sys/resource.h>
+
 #include <cstdlib>
 #include <cstring>
 #include <ctime>
@@ -652,6 +654,10 @@ void check_auth_sync(TimerData *, tick_t)
     if ((pid = fork()) > 0)
         return;
 
+    // If we're a child, run as a lower priority process
+    if (pid == 0)
+        setpriority(PRIO_PROCESS, getpid(), 10);
+
     mmo_auth_sync();
 
     // If we're a child we should suicide now.