From ff8c01a1692800acb1c0800812fe1dc19d8e7975 Mon Sep 17 00:00:00 2001
From: Developer <dev@localhost>
Date: Mon, 20 Apr 2026 22:16:34 -0400
Subject: [PATCH] CRITICAL FIX: Correct MySQL memory field extraction

The calculate_server_capacity() function was extracting the wrong
field from detect_mysql_memory_usage(), causing incorrect available
memory calculations and resulting in 0 max_children recommendations.

Bug: Was extracting field 1 (buffer_pool_mb)
Fix: Now extracts field 3 (estimated_total_mb - actual usage)

detect_mysql_memory_usage returns: buffer_pool|connections|total_mb|status

This fix allows Level 5 optimization to correctly calculate PHP-FPM
capacity and make proper recommendations instead of recommending 0.
---
 lib/php-calculator-improved.sh | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/lib/php-calculator-improved.sh b/lib/php-calculator-improved.sh
index ca60dd4..091c966 100644
--- a/lib/php-calculator-improved.sh
+++ b/lib/php-calculator-improved.sh
@@ -122,8 +122,9 @@ calculate_max_children_memory_based() {
     local mysql_info
     mysql_info=$(detect_mysql_memory_usage 2>/dev/null)
     if [ $? -eq 0 ]; then
-        # FIX: detect_mysql_memory_usage returns: memory|status (only 2 fields)
-        mysql_memory_mb=$(echo "$mysql_info" | cut -d'|' -f1)
+        # FIX: detect_mysql_memory_usage returns: buffer_pool|connections|estimated_total_mb|status (4 fields)
+        # Extract field 3 (estimated_total_mb - the actual memory usage)
+        mysql_memory_mb=$(echo "$mysql_info" | cut -d'|' -f3)
     fi
 
     # Available memory for PHP-FPM (after system + MySQL reserves)
@@ -372,8 +373,9 @@ calculate_server_capacity() {
     local mysql_info
     mysql_info=$(detect_mysql_memory_usage 2>/dev/null)
     if [ $? -eq 0 ]; then
-        # FIX: detect_mysql_memory_usage returns: memory|status (only 2 fields)
-        mysql_memory_mb=$(echo "$mysql_info" | cut -d'|' -f1)
+        # FIX: detect_mysql_memory_usage returns: buffer_pool|connections|estimated_total_mb|status (4 fields)
+        # Extract field 3 (estimated_total_mb - the actual memory usage)
+        mysql_memory_mb=$(echo "$mysql_info" | cut -d'|' -f3)
     fi
 
     # Available memory for PHP-FPM (after system + MySQL reserves)