Calculate the PHP Pool memory usage

calculate-php-pool/README.md

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+# Run command
+
+```bash
+bash -c "$(wget -qLO - https://raw.githubusercontent.com/bigbeartechworld/big-bear-scripts/master/calculate-php-pool/run.sh)"
+```

calculate-php-pool/run.sh

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+#!/bin/bash
+
+# Step 1: Find running PHP-FPM processes
+php_fpm_versions=$(ps -eo comm | grep php-fpm | grep -v grep | sort | uniq)
+
+if [[ -z "$php_fpm_versions" ]]; then
+    echo "No PHP-FPM processes found."
+    exit 1
+fi
+
+# Step 2: Allow user to select a version if multiple are found
+array=($php_fpm_versions)
+if [ ${#array[@]} -gt 1 ]; then
+    echo "Multiple PHP-FPM versions detected. Please select one:"
+    select version in "${array[@]}"; do
+        if [[ " ${array[*]} " =~ " ${version} " ]]; then
+            php_fpm_version=$version
+            break
+        else
+            echo "Invalid selection. Please try again."
+        fi
+    done
+else
+    php_fpm_version=${array[0]}
+fi
+
+echo "Selected PHP-FPM version: $php_fpm_version"
+
+# Step 3: Calculate average memory usage
+avg_memory=$(ps --no-headers -o rss -C $php_fpm_version | awk '{sum+=$1; ++n} END {print sum/n/1024}')
+
+echo "Average Memory Usage per process (MB): $avg_memory"
+
+# Extract PHP version number from the selected PHP-FPM version
+php_version=$(echo "$php_fpm_version" | sed -E 's/[^0-9]*([0-9]+\.[0-9]+).*/\1/')
+
+# Step 4: Read PHP-FPM pool configuration (adjust the path to your php-fpm pool config)
+pool_config="/etc/php/$php_version/fpm/pool.d/www.conf"  # Example path, change as needed
+if [[ -f "$pool_config" ]]; then
+    max_children=$(grep "^pm.max_children" $pool_config | cut -d "=" -f2 | xargs)
+else
+    echo "Pool configuration file not found."
+    exit 1
+fi
+
+echo "Max children set in pool: $max_children"
+
+# Calculate total memory requirement and display in MB or GB
+total_memory=$(echo "$avg_memory * $max_children" | bc)
+if (( $(echo "$total_memory < 1024" | bc -l) )); then
+    echo "Total estimated memory required for all PHP-FPM processes: $total_memory MB"
+else
+    total_memory_gb=$(echo "$total_memory / 1024" | bc -l)
+    printf "Total estimated memory required for all PHP-FPM processes: %.2f GB\n" $total_memory_gb
+fi