diff --git a/src/WebJobs.Script.WebHost/Diagnostics/LinuxAppServiceEventGenerator.cs b/src/WebJobs.Script.WebHost/Diagnostics/LinuxAppServiceEventGenerator.cs
index 341aeb5a01..9497eb7f4b 100644
--- a/src/WebJobs.Script.WebHost/Diagnostics/LinuxAppServiceEventGenerator.cs
+++ b/src/WebJobs.Script.WebHost/Diagnostics/LinuxAppServiceEventGenerator.cs
@@ -15,6 +15,7 @@ internal class LinuxAppServiceEventGenerator : LinuxEventGenerator
         private readonly HostNameProvider _hostNameProvider;
         private readonly IOptions<FunctionsHostingConfigOptions> _functionsHostingConfigOptions;
         private readonly IOptions<AzureMonitorLoggingOptions> _azureMonitorLoggingOptions;
+        private readonly int _pid = Environment.ProcessId;
         private ILinuxAppServiceFileLogger _functionsExecutionEventsCategoryLogger;
         private ILinuxAppServiceFileLogger _functionsLogsCategoryLogger;
         private ILinuxAppServiceFileLogger _functionsMetricsCategoryLogger;
@@ -45,9 +46,9 @@ public LinuxAppServiceEventGenerator(
 
         internal ILinuxAppServiceFileLogger FunctionsDetailsCategoryLogger => _functionsDetailsCategoryLogger;
 
-        public static string TraceEventRegex { get; } = "(?<Level>[0-6]),(?<SubscriptionId>[^,]*),(?<HostName>[^,]*),(?<AppName>[^,]*),(?<FunctionName>[^,]*),(?<EventName>[^,]*),(?<Source>[^,]*),\"(?<Details>.*)\",\"(?<Summary>.*)\",(?<HostVersion>[^,]*),(?<EventTimestamp>[^,]+),(?<ExceptionType>[^,]*),\"(?<ExceptionMessage>.*)\",(?<FunctionInvocationId>[^,]*),(?<HostInstanceId>[^,]*),(?<ActivityId>[^,\"]*)";
+        public static string TraceEventRegex { get; } = "(?<Level>[0-6]),(?<SubscriptionId>[^,]*),(?<HostName>[^,]*),(?<AppName>[^,]*),(?<FunctionName>[^,]*),(?<EventName>[^,]*),(?<Source>[^,]*),\"(?<Details>.*)\",\"(?<Summary>.*)\",(?<HostVersion>[^,]*),(?<EventTimestamp>[^,]+),(?<ExceptionType>[^,]*),\"(?<ExceptionMessage>.*)\",(?<FunctionInvocationId>[^,]*),(?<HostInstanceId>[^,]*),(?<ActivityId>[^,\"]*),(?<Pid>[^,\"]*)";
 
-        public static string MetricEventRegex { get; } = "(?<SubscriptionId>[^,]*),(?<AppName>[^,]*),(?<FunctionName>[^,]*),(?<EventName>[^,]*),(?<Average>\\d*),(?<Min>\\d*),(?<Max>\\d*),(?<Count>\\d*),(?<HostVersion>[^,]*),(?<EventTimestamp>[^,]+),(?<Details>[^,\"]*)";
+        public static string MetricEventRegex { get; } = "(?<SubscriptionId>[^,]*),(?<AppName>[^,]*),(?<FunctionName>[^,]*),(?<EventName>[^,]*),(?<Average>\\d*),(?<Min>\\d*),(?<Max>\\d*),(?<Count>\\d*),(?<HostVersion>[^,]*),(?<EventTimestamp>[^,]+),(?<Details>[^,\"]*),(?<Pid>[^,\"]*)";
 
         public static string DetailsEventRegex { get; } = "(?<AppName>[^,]*),(?<FunctionName>[^,]*),\"(?<InputBindings>.*)\",\"(?<OutputBindings>.*)\",(?<ScriptType>[^,]*),(?<IsDisabled>[0|1])";
 
@@ -64,7 +65,7 @@ public override void LogFunctionTraceEvent(LogLevel level, string subscriptionId
             var hostName = _hostNameProvider.Value;
             using (FunctionsSystemLogsEventSource.SetActivityId(activityId))
             {
-                WriteEvent(_functionsLogsCategoryLogger, $"{(int)ToEventLevel(level)},{subscriptionId},{hostName},{appName},{functionName},{eventName},{source},{NormalizeString(details)},{NormalizeString(summary)},{hostVersion},{formattedEventTimestamp},{exceptionType},{NormalizeString(exceptionMessage)},{functionInvocationId},{hostInstanceId},{activityId}");
+                WriteEvent(_functionsLogsCategoryLogger, $"{(int)ToEventLevel(level)},{subscriptionId},{hostName},{appName},{functionName},{eventName},{source},{NormalizeString(details)},{NormalizeString(summary)},{hostVersion},{formattedEventTimestamp},{exceptionType},{NormalizeString(exceptionMessage)},{functionInvocationId},{hostInstanceId},{activityId},{_pid}");
             }
         }
 
@@ -72,7 +73,7 @@ public override void LogFunctionMetricEvent(string subscriptionId, string appNam
             long minimum, long maximum, long count, DateTime eventTimestamp, string data, string runtimeSiteName, string slotName)
         {
             var hostVersion = ScriptHost.Version;
-            WriteEvent(_functionsMetricsCategoryLogger, $"{subscriptionId},{appName},{functionName},{eventName},{average},{minimum},{maximum},{count},{hostVersion},{eventTimestamp.ToString(EventTimestampFormat)},{data}");
+            WriteEvent(_functionsMetricsCategoryLogger, $"{subscriptionId},{appName},{functionName},{eventName},{average},{minimum},{maximum},{count},{hostVersion},{eventTimestamp.ToString(EventTimestampFormat)},{data},{_pid}");
         }
 
         public override void LogFunctionDetailsEvent(string siteName, string functionName, string inputBindings, string outputBindings,
diff --git a/test/WebJobs.Script.Tests/Diagnostics/LinuxAppServiceEventGeneratorTests.cs b/test/WebJobs.Script.Tests/Diagnostics/LinuxAppServiceEventGeneratorTests.cs
index 58c6235a45..471c9f7251 100644
--- a/test/WebJobs.Script.Tests/Diagnostics/LinuxAppServiceEventGeneratorTests.cs
+++ b/test/WebJobs.Script.Tests/Diagnostics/LinuxAppServiceEventGeneratorTests.cs
@@ -21,6 +21,7 @@ public class LinuxAppServiceEventGeneratorTests
 
         private readonly LinuxAppServiceEventGenerator _generator;
         private readonly List<string> _events;
+        private readonly int _pid = Environment.ProcessId;
         private IOptions<FunctionsHostingConfigOptions> _functionsHostingConfigOptions;
         private IOptions<AzureMonitorLoggingOptions> _azureMonitorOptions;
 
@@ -66,7 +67,7 @@ public void ParseLogEvents(LogLevel level, string subscriptionId, string appName
             var match = regex.Match(evt);
 
             Assert.True(match.Success);
-            Assert.Equal(17, match.Groups.Count);
+            Assert.Equal(18, match.Groups.Count);
 
             DateTime dt;
             var groupMatches = match.Groups.Cast<Group>().Select(p => p.Value).Skip(1).ToArray();
@@ -86,7 +87,8 @@ public void ParseLogEvents(LogLevel level, string subscriptionId, string appName
                 p => Assert.Equal(exceptionMessage, LinuxContainerEventGeneratorTests.UnNormalize(p)),
                 p => Assert.Equal(functionInvocationId, p),
                 p => Assert.Equal(hostInstanceId, p),
-                p => Assert.Equal(activityId, p));
+                p => Assert.Equal(activityId, p),
+                p => Assert.Equal(_pid.ToString(), p));
         }
 
         [Theory]
@@ -102,7 +104,7 @@ public void ParseMetricEvents(string subscriptionId, string appName, string func
             var match = regex.Match(evt);
 
             Assert.True(match.Success);
-            Assert.Equal(12, match.Groups.Count);
+            Assert.Equal(13, match.Groups.Count);
 
             DateTime dt;
             var groupMatches = match.Groups.Cast<Group>().Select(p => p.Value).Skip(1).ToArray();
@@ -117,7 +119,8 @@ public void ParseMetricEvents(string subscriptionId, string appName, string func
                 p => Assert.Equal(count, long.Parse(p)),
                 p => Assert.Equal(ScriptHost.Version, p),
                 p => Assert.True(DateTime.TryParse(p, out dt)),
-                p => Assert.Equal(data, p));
+                p => Assert.Equal(data, p),
+                p => Assert.Equal(_pid.ToString(), p));
         }
 
         [Theory]