Add server-wide memory capacity check (Option 9) - Critical OOM prevention
NEW FEATURES: - Menu Option 9: Check Server Memory Capacity (OOM Risk) - Calculates total memory if ALL PHP-FPM pools hit max_children - Identifies servers at risk of Out-Of-Memory (OOM) kills - Provides balanced memory allocation recommendations TWO NEW ANALYZER FUNCTIONS: 1. calculate_server_memory_capacity() - Iterates through all users/PHP-FPM pools - Calculates: max_children × avg_memory_per_process - Sums total across all pools - Compares to total RAM - Returns: total_required|total_ram|percentage|status Status Levels: - HEALTHY: <60% RAM (safe) - CAUTION: 60-75% RAM (watch) - WARNING: 75-90% RAM (risky) - CRITICAL: >90% RAM (OOM likely!) 2. calculate_balanced_memory_allocation() - Analyzes traffic for each user (requests/minute) - Calculates proportional memory allocation - Reserves 20% of RAM for system (min 2GB) - Distributes remaining RAM based on traffic - Returns recommendations: REDUCE / INCREASE / OPTIMAL Example output: USER CURRENT_MAX AVG_MB TRAFFIC_RPM RECOMMENDED_MAX REASON user1 50 45MB 120 75 INCREASE (traffic demands) user2 100 60MB 10 15 REDUCE (prevent OOM) MENU OPTION 9 FEATURES: - Shows total RAM vs required memory - Displays percentage and color-coded status - Optional per-user breakdown table - Optional balanced recommendations - Interactive: ask user what details to show USE CASE: Server has 16GB RAM. 10 users each with max_children=50, avg 50MB/process. Total required: 10 × 50 × 50MB = 25GB Percentage: 156% of RAM → CRITICAL! Result: Server WILL run out of memory and kill processes! This feature addresses user's request: "calculating max children and memory allocation and then combining all the accounts to see if the memory will hit over the memory cap if at capacity" CRITICAL for preventing OOM kills on shared hosting servers! 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
cschantz
@@ -50,6 +50,7 @@ show_main_menu() {
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cecho " ${GREEN}6${NC}) View OPcache Statistics"
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cecho " ${GREEN}7${NC}) View PHP-FPM Process Stats"
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cecho " ${GREEN}8${NC}) Check for Configuration Issues"
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cecho " ${GREEN}9${NC}) Check Server Memory Capacity (OOM Risk)"
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echo ""
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cecho " ${YELLOW}b${NC}) Backup Current Configurations"
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cecho " ${YELLOW}r${NC}) Restore from Backup"
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@@ -722,6 +723,145 @@ check_config_issues() {
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read -p "Press Enter to continue..."
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}
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# ============================================================================
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# OPTION 9: CHECK SERVER MEMORY CAPACITY
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# ============================================================================
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check_server_memory_capacity() {
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show_banner
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cecho "${WHITE}${BOLD}SERVER MEMORY CAPACITY CHECK${NC}"
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echo ""
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cecho "${YELLOW}This checks if all PHP-FPM pools hitting max_children would cause OOM...${NC}"
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echo ""
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# Run capacity analysis
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cecho "${CYAN}Analyzing PHP-FPM memory requirements...${NC}"
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echo ""
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local result
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result=$(calculate_server_memory_capacity 2>&1)
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# Parse result (main output is last line)
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local main_result
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main_result=$(echo "$result" | tail -1)
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local total_required total_ram percentage status details
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total_required=$(echo "$main_result" | cut -d'|' -f1)
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total_ram=$(echo "$main_result" | cut -d'|' -f2)
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percentage=$(echo "$main_result" | cut -d'|' -f3)
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status=$(echo "$main_result" | cut -d'|' -f4)
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# Display summary
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cecho "${CYAN}═══════════════════════════════════════════════════════════════════${NC}"
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cecho "${WHITE}${BOLD}MEMORY CAPACITY ANALYSIS${NC}"
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cecho "${CYAN}═══════════════════════════════════════════════════════════════════${NC}"
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echo ""
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cecho " Total Server RAM: ${WHITE}${total_ram}MB${NC}"
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cecho " Required if ALL pools at max_children: ${WHITE}${total_required}MB${NC}"
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cecho " Percentage of RAM: ${WHITE}${percentage}%${NC}"
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echo ""
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# Display status with color
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case "$status" in
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CRITICAL)
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cecho " Status: ${RED}${BOLD}CRITICAL - HIGH OOM RISK!${NC}"
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cecho ""
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cecho " ${RED}WARNING: If all PHP-FPM pools hit their max_children limit,${NC}"
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cecho " ${RED}the server will likely run out of memory and kill processes!${NC}"
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;;
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WARNING)
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cecho " Status: ${YELLOW}${BOLD}WARNING - MODERATE OOM RISK${NC}"
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cecho ""
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cecho " ${YELLOW}CAUTION: Memory usage is high. Some pools may need reduction.${NC}"
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;;
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CAUTION)
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cecho " Status: ${YELLOW}${BOLD}CAUTION - WATCH MEMORY USAGE${NC}"
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cecho ""
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cecho " ${YELLOW}Memory usage is elevated but manageable.${NC}"
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;;
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HEALTHY)
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cecho " Status: ${GREEN}${BOLD}HEALTHY - LOW OOM RISK${NC}"
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cecho ""
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cecho " ${GREEN}Memory allocation appears safe.${NC}"
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;;
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esac
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echo ""
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cecho "${CYAN}═══════════════════════════════════════════════════════════════════${NC}"
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echo ""
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# Ask if user wants detailed breakdown
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read -p "Show detailed per-user breakdown? (y/n): " show_details
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if [[ "$show_details" =~ ^[Yy]$ ]]; then
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echo ""
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cecho "${WHITE}${BOLD}PER-USER BREAKDOWN${NC}"
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cecho "${CYAN}─────────────────────────────────────────────────────────────────────${NC}"
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echo ""
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# Get details from stderr of previous call
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local details_output
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details_output=$(echo "$result" | head -n -1)
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printf "%-20s %12s %12s %12s\n" "USER" "MAX_CHILDREN" "AVG/PROCESS" "MAX_MEMORY"
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printf "%-20s %12s %12s %12s\n" "--------------------" "------------" "------------" "------------"
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while IFS='|' read -r username max_children avg_mb pool_max_mb; do
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[ -z "$username" ] && continue
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printf "%-20s %12s %12s %12s\n" "$username" "$max_children" "$avg_mb" "$pool_max_mb"
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done <<< "$details_output"
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echo ""
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fi
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# Ask if user wants balanced recommendations
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echo ""
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read -p "Calculate balanced memory allocation recommendations? (y/n): " show_recommendations
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if [[ "$show_recommendations" =~ ^[Yy]$ ]]; then
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echo ""
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cecho "${WHITE}${BOLD}BALANCED MEMORY ALLOCATION RECOMMENDATIONS${NC}"
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cecho "${CYAN}─────────────────────────────────────────────────────────────────────${NC}"
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echo ""
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cecho "${YELLOW}Calculating optimal max_children based on traffic...${NC}"
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echo ""
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local recommendations
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recommendations=$(calculate_balanced_memory_allocation 2>/dev/null)
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# Display header
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local header
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header=$(echo "$recommendations" | head -1)
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echo "$header" | awk -F'|' '{printf "%-15s %8s %10s %12s %12s %15s %20s\n", $1, $2, $3, $4, $5, $6, $7}'
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echo "--------------------------------------------------------------------------------------------------------"
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# Display recommendations
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echo "$recommendations" | tail -n +2 | while IFS='|' read -r user current_max avg_mb traffic_rpm recommended_max allocated_mb reason; do
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[ -z "$user" ] && continue
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# Color code reason
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if [[ "$reason" == *"REDUCE"* ]]; then
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color="${RED}"
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elif [[ "$reason" == *"INCREASE"* ]]; then
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color="${GREEN}"
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else
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color="${WHITE}"
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fi
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printf "%-15s %8s %10s %12s ${color}%12s${NC} %15s %20s\n" "$user" "$current_max" "$avg_mb" "$traffic_rpm" "$recommended_max" "$allocated_mb" "$reason"
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done
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echo ""
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cecho "${YELLOW}NOTE: These are recommendations based on proportional traffic.${NC}"
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cecho "${YELLOW}Actual needs may vary. Always test changes carefully.${NC}"
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echo ""
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fi
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echo ""
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cecho "${CYAN}═══════════════════════════════════════════════════════════════════${NC}"
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read -p "Press Enter to continue..."
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}
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# ============================================================================
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# MAIN LOOP
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# ============================================================================
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@@ -775,6 +915,9 @@ main() {
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8)
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check_config_issues
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;;
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9)
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check_server_memory_capacity
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;;
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b)
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cecho "${YELLOW}Backup feature not yet implemented${NC}"
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sleep 2
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