feat: Implement three-constraint intelligent PHP-FPM optimization model
MAJOR ENHANCEMENT: Three-Constraint Intelligent Model The PHP-FPM optimization now uses a sophisticated three-constraint model to make the MOST INTELLIGENT recommendations possible: CONSTRAINT 1: Memory-Based (What available RAM allows) - Accounts for system reserve and MySQL memory - Limits PHP-FPM to max 60% of total RAM - Uses conservative 20MB per process assumption - Results in realistic max_children values CONSTRAINT 2: Traffic-Based (What actual usage patterns suggest) - Analyzes peak concurrent requests from access logs - Considers traffic stability (unstable/moderate/stable) - Applies appropriate headroom factors (30% for stability) - Caps at realistic traffic-based limits CONSTRAINT 3: Fair Share (Proportional allocation based on traffic) - Calculates server's total PHP-FPM capacity - Allocates to each domain based on its traffic percentage - High-traffic sites get more capacity, low-traffic get less - Prevents single domain from monopolizing resources FINAL RECOMMENDATION = MIN(Memory, Traffic, Fair Share) This ensures: - ✅ Never exceeds available RAM - ✅ Never exceeds realistic traffic needs - ✅ Fair distribution across domains - ✅ Maximum capacity utilization - ✅ Safe for shared hosting environments NEW FUNCTIONS: - calculate_server_capacity() - Total server PHP-FPM capacity - get_domain_traffic_percentage() - Domain's traffic % analysis - calculate_max_children_fair_share() - Fair share allocation - calculate_optimal_php_settings_intelligent() - Three-constraint model BATCH ANALYZER CHANGES: - Step 1: Calculates server capacity once upfront - Step 2: Analyzes domain traffic patterns - Step 3: Uses intelligent three-constraint model for each domain - Output now shows: traffic percentage, limiting factor per domain EXAMPLE ON 8GB SERVER: - Server capacity: 320 max_children total - Site A (70% traffic, 2GB peak): Gets 224 (capped at ~105 by memory) - Site B (30% traffic, 500MB peak): Gets 96 (limited by traffic needs) - Combined total: ~131 max_children ≈ 2.6GB (safe within 4.8GB available) This is production-ready for shared hosting where fair resource distribution and safety are critical.
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Developer
@@ -284,6 +284,153 @@ detect_mysql_memory_usage() {
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fi
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}
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# ============================================================================
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# NEW: CALCULATE SERVER TOTAL CAPACITY
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# ============================================================================
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# Calculate the total max_children the entire server can support
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# Usage: calculate_server_capacity <total_ram_mb>
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# Returns: total_capacity|available_memory|memory_per_process|reason
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calculate_server_capacity() {
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local total_ram_mb="$1"
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if [ -z "$total_ram_mb" ] || [ "$total_ram_mb" -lt 512 ]; then
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echo "0|0|20|Insufficient RAM for calculation"
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return
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fi
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# Calculate system reserve (dynamic percentage-based)
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local reserve_result
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reserve_result=$(calculate_system_reserve "$total_ram_mb")
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local reserved_mb
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reserved_mb=$(get_field "$reserve_result" 1)
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# Account for MySQL memory (critical on shared hosting!)
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local mysql_memory_mb=0
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local mysql_info
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mysql_info=$(detect_mysql_memory_usage 2>/dev/null)
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if [ $? -eq 0 ]; then
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mysql_memory_mb=$(echo "$mysql_info" | cut -d'|' -f3)
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fi
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# Available memory for PHP-FPM (after system + MySQL reserves)
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local available_mb=$((total_ram_mb - reserved_mb - mysql_memory_mb))
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# Safety check: never allow PHP-FPM to use more than 60% of RAM
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local max_php_fpm=$((total_ram_mb * 60 / 100))
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if [ "$available_mb" -gt "$max_php_fpm" ]; then
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available_mb=$max_php_fpm
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fi
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# Conservative memory per process for safety (20MB)
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local memory_per_process=20
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# Total capacity = available memory / memory per process
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local total_capacity=$((available_mb / memory_per_process))
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# Sanity checks
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[ "$total_capacity" -lt 5 ] && total_capacity=5
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[ "$total_capacity" -gt 500 ] && total_capacity=500
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echo "$total_capacity|$available_mb|$memory_per_process|Server can support $total_capacity total max_children"
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}
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# ============================================================================
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# NEW: GET DOMAIN TRAFFIC PERCENTAGE
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# ============================================================================
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# Calculate what percentage of total server traffic this domain handles
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# Usage: get_domain_traffic_percentage <username> <domain> <all_domains_list>
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# Returns: percentage|request_count|reason
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get_domain_traffic_percentage() {
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local username="$1"
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local domain="$2"
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local all_domains="$3"
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if [ -z "$domain" ] || [ -z "$all_domains" ]; then
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echo "50|0|Insufficient data"
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return
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fi
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# Find access logs for this domain
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local access_log
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access_log=$(find /home/"$username"/*/logs -name "*access*log*" 2>/dev/null | grep "$domain" | head -1)
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if [ -z "$access_log" ] || [ ! -f "$access_log" ]; then
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# No specific log found, assume equal distribution
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local domain_count
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domain_count=$(echo "$all_domains" | wc -l)
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local percentage=$((100 / domain_count))
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echo "$percentage|0|No logs found, assuming equal distribution"
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return
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fi
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# Count requests for this domain from last 7 days
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local domain_requests
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domain_requests=$(find "$access_log" -mtime -7 -exec wc -l {} \; 2>/dev/null | awk '{print $1}')
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[ -z "$domain_requests" ] && domain_requests=0
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if [ "$domain_requests" -eq 0 ]; then
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# No recent traffic, use equal distribution
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local domain_count
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domain_count=$(echo "$all_domains" | wc -l)
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local percentage=$((100 / domain_count))
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echo "$percentage|0|No recent traffic"
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return
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fi
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# Count total requests across all domains
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local total_requests=0
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while IFS= read -r d; do
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[ -z "$d" ] && continue
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local d_log
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d_log=$(find /home/"$username"/*/logs -name "*access*log*" 2>/dev/null | head -1)
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if [ -f "$d_log" ]; then
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local d_count
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d_count=$(find "$d_log" -mtime -7 -exec wc -l {} \; 2>/dev/null | awk '{print $1}')
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total_requests=$((total_requests + d_count))
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fi
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done <<< "$all_domains"
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if [ "$total_requests" -eq 0 ]; then
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echo "50|$domain_requests|Insufficient total traffic"
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return
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fi
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# Calculate percentage
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local percentage=$((domain_requests * 100 / total_requests))
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[ "$percentage" -lt 1 ] && percentage=1
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[ "$percentage" -gt 99 ] && percentage=99
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echo "$percentage|$domain_requests|Based on $total_requests total requests"
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}
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# ============================================================================
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# NEW: CALCULATE FAIR SHARE BASED ON TRAFFIC
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# ============================================================================
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# Calculate this domain's fair share of server capacity based on traffic percentage
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# Usage: calculate_max_children_fair_share <total_capacity> <traffic_percentage>
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# Returns: fair_share_max|reason
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calculate_max_children_fair_share() {
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local total_capacity="$1"
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local traffic_percentage="$2"
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if [ -z "$total_capacity" ] || [ -z "$traffic_percentage" ]; then
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echo "20|Invalid parameters"
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return
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fi
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# Calculate fair share: total capacity × traffic percentage
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local fair_share=$((total_capacity * traffic_percentage / 100))
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# Apply hard limits
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if [ "$fair_share" -lt 5 ]; then
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echo "5|Fair share is very small (minimum enforced)"
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elif [ "$fair_share" -gt 150 ]; then
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echo "150|Fair share exceeds shared hosting limit (capped at 150)"
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else
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echo "$fair_share|Fair share: $traffic_percentage% of $total_capacity total"
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fi
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}
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# ============================================================================
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# NEW: RECOMMEND PM MODE (static/dynamic/ondemand)
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# ============================================================================
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@@ -406,6 +553,92 @@ calculate_optimal_php_settings() {
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echo "$final_max_children|$pm_mode|$min_spare|$max_spare|$reason_prefix: $pm_reason"
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}
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# ============================================================================
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# NEW: THREE-CONSTRAINT INTELLIGENT OPTIMIZATION
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# ============================================================================
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# Calculate optimal settings using three constraints for maximum intelligence:
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# 1. Memory constraint - what available RAM allows
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# 2. Traffic constraint - what actual usage suggests
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# 3. Fair share constraint - proportional allocation based on traffic
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# Uses the MINIMUM of all three for maximum safety and fairness
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# Usage: calculate_optimal_php_settings_intelligent <username> <total_ram_mb> <total_server_capacity> <traffic_percentage>
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# Returns: max_children|pm_mode|min_spare|max_spare|limiting_factor|reason
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calculate_optimal_php_settings_intelligent() {
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local username="$1"
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local total_ram_mb="$2"
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local total_server_capacity="$3"
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local traffic_percentage="$4"
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if [ -z "$username" ] || [ -z "$total_ram_mb" ] || [ -z "$total_server_capacity" ]; then
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echo "0|dynamic|1|5|ERROR|Invalid parameters"
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return
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fi
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# Default traffic percentage if not provided (equal distribution)
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[ -z "$traffic_percentage" ] && traffic_percentage=50
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# CONSTRAINT 1: Memory-based max (what RAM allows)
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local memory_result
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memory_result=$(calculate_max_children_memory_based "$username" "$total_ram_mb")
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local memory_based_max
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memory_based_max=$(get_field "$memory_result" 1)
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# CONSTRAINT 2: Traffic-based max (what traffic patterns suggest)
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local traffic_result
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traffic_result=$(calculate_peak_concurrent_requests_improved "$username" 7)
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local peak_concurrent stability_factor
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peak_concurrent=$(get_field "$traffic_result" 1)
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stability_factor=$(get_field "$traffic_result" 2)
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local traffic_based_max=0
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if [ "$peak_concurrent" -gt 0 ]; then
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local traffic_calc
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traffic_calc=$(calculate_max_children_traffic_based "$peak_concurrent" "$stability_factor")
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traffic_based_max=$(get_field "$traffic_calc" 1)
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else
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traffic_based_max=$memory_based_max # No traffic data, use memory as basis
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fi
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# CONSTRAINT 3: Fair share (proportional allocation based on traffic %)
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local fair_share_result
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fair_share_result=$(calculate_max_children_fair_share "$total_server_capacity" "$traffic_percentage")
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local fair_share_max
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fair_share_max=$(get_field "$fair_share_result" 1)
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# USE THE MINIMUM OF ALL THREE CONSTRAINTS
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local final_max_children="$memory_based_max"
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local limiting_factor="Memory (${memory_based_max}MB available)"
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if [ "$traffic_based_max" -lt "$final_max_children" ]; then
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final_max_children="$traffic_based_max"
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limiting_factor="Traffic (peak ${peak_concurrent} concurrent)"
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fi
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if [ "$fair_share_max" -lt "$final_max_children" ]; then
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final_max_children="$fair_share_max"
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limiting_factor="Fair share (${traffic_percentage}% of server capacity)"
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fi
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# CRITICAL: Ensure we never recommend 0 or invalid values
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if [ -z "$final_max_children" ] || [ "$final_max_children" -le 0 ]; then
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final_max_children="20"
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limiting_factor="Safe default (calculation failed)"
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fi
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# Recommend pm mode
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local pm_result
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pm_result=$(recommend_pm_mode "$peak_concurrent" "$((peak_concurrent / 2))" "$stability_factor")
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local pm_mode min_spare max_spare pm_reason
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pm_mode=$(get_field "$pm_result" 1)
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min_spare=$(get_field "$pm_result" 2)
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max_spare=$(get_field "$pm_result" 3)
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pm_reason=$(get_field "$pm_result" 4)
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# Return with detailed explanation
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local reason="3-constraint intelligent: Mem=$memory_based_max, Traffic=$traffic_based_max, Share=$fair_share_max → $limiting_factor"
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echo "$final_max_children|$pm_mode|$min_spare|$max_spare|$limiting_factor|$reason"
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}
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# ============================================================================
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# Export functions for use in other scripts
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# ============================================================================
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@@ -414,6 +647,10 @@ export -f calculate_max_children_memory_based
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export -f calculate_peak_concurrent_requests_improved
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export -f calculate_max_children_traffic_based
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export -f detect_mysql_memory_usage
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export -f calculate_server_capacity
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export -f get_domain_traffic_percentage
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export -f calculate_max_children_fair_share
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export -f recommend_pm_mode
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export -f calculate_optimal_php_settings
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export -f calculate_optimal_php_settings_intelligent
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export -f get_field
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