File size: 3,820 Bytes
6a7089a | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 | #!/usr/bin/env bash
set -euo pipefail
# Simulate memory load by launching headless instances and filling them with tabs.
# Use alongside the monitoring dashboard to watch memory usage grow.
#
# Usage:
# ./scripts/simulate-memory-load.sh [host:port] [instances] [tabs-per-instance]
#
# Examples:
# ./scripts/simulate-memory-load.sh # 2 instances, 10 tabs each
# ./scripts/simulate-memory-load.sh localhost:9867 3 20 # 3 instances, 20 tabs each
#
# Prerequisites:
# - pinchtab running in server mode: ./pinchtab server
# - Chrome installed
HOST="${1:-localhost:9867}"
NUM_INSTANCES="${2:-2}"
TABS_PER_INSTANCE="${3:-10}"
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
CYAN='\033[0;36m'
NC='\033[0m'
URLS=(
"https://en.wikipedia.org/wiki/Main_Page"
"https://news.ycombinator.com"
"https://github.com/trending"
"https://developer.mozilla.org/en-US/"
"https://www.bbc.com/news"
"https://stackoverflow.com/questions"
"https://www.reddit.com/r/programming"
"https://docs.github.com"
"https://go.dev/doc/"
"https://react.dev"
"https://www.typescriptlang.org/docs/"
"https://kubernetes.io/docs/home/"
"https://www.rust-lang.org"
"https://nodejs.org/en/docs"
"https://www.postgresql.org/docs/"
)
api() {
local method="$1" path="$2"
shift 2
curl -s -X "$method" "http://${HOST}${path}" \
-H "Content-Type: application/json" \
"$@"
}
echo -e "${CYAN}Memory Load Simulator${NC}"
echo -e "Target: ${HOST}"
echo -e "Instances to launch: ${NUM_INSTANCES}"
echo -e "Tabs per instance: ${TABS_PER_INSTANCE}"
echo ""
# Check server is up
STATUS=$(curl -s -o /dev/null -w "%{http_code}" "http://${HOST}/health" 2>/dev/null || echo "000")
if [ "$STATUS" != "200" ]; then
echo -e "${RED}✗ Server not reachable at ${HOST} (HTTP ${STATUS})${NC}"
echo " Start pinchtab first: ./pinchtab server"
exit 1
fi
echo -e "${GREEN}✓ Server healthy${NC}"
echo ""
INSTANCE_IDS=()
# Phase 1: Launch instances
echo -e "${YELLOW}Phase 1: Launching ${NUM_INSTANCES} headless instances...${NC}"
for i in $(seq 1 "$NUM_INSTANCES"); do
RESULT=$(api POST "/instances/launch" -d '{"mode":"headless"}')
ID=$(echo "$RESULT" | grep -o '"id":"[^"]*"' | head -1 | cut -d'"' -f4)
if [ -z "$ID" ]; then
echo -e " ${RED}✗ Failed to launch instance ${i}: ${RESULT}${NC}"
continue
fi
INSTANCE_IDS+=("$ID")
echo -e " ${GREEN}✓ Instance ${i}: ${ID}${NC}"
sleep 1
done
if [ ${#INSTANCE_IDS[@]} -eq 0 ]; then
echo -e "${RED}No instances launched. Exiting.${NC}"
exit 1
fi
# Wait for instances to be ready
echo ""
echo -e "${YELLOW}Waiting for instances to initialize...${NC}"
sleep 3
# Phase 2: Open tabs
echo ""
echo -e "${YELLOW}Phase 2: Opening ${TABS_PER_INSTANCE} tabs per instance...${NC}"
for ID in "${INSTANCE_IDS[@]}"; do
echo -e " ${CYAN}Instance ${ID}:${NC}"
for j in $(seq 1 "$TABS_PER_INSTANCE"); do
URL_IDX=$(( (j - 1) % ${#URLS[@]} ))
URL="${URLS[$URL_IDX]}"
RESULT=$(api POST "/instances/${ID}/tabs/open" -d "{\"url\":\"${URL}\"}" 2>/dev/null)
printf "\r Opened %d/%d tabs" "$j" "$TABS_PER_INSTANCE"
sleep 0.5
done
echo -e "\r ${GREEN}✓ Opened ${TABS_PER_INSTANCE} tabs${NC}"
done
# Phase 3: Summary
echo ""
echo -e "${GREEN}Done!${NC}"
echo ""
echo -e "${CYAN}Monitor memory in the dashboard:${NC}"
echo -e " 1. Open http://${HOST} → Monitoring tab"
echo -e " 2. Enable 'Memory Metrics' in Settings"
echo -e " 3. Watch JS heap grow as pages load"
echo ""
echo -e "${CYAN}Check metrics via API:${NC}"
for ID in "${INSTANCE_IDS[@]}"; do
echo -e " curl http://${HOST}/instances/${ID}/tabs"
done
echo ""
echo -e "${CYAN}Cleanup — stop all instances:${NC}"
for ID in "${INSTANCE_IDS[@]}"; do
echo -e " curl -X POST http://${HOST}/instances/${ID}/stop"
done
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