reconfigure-service.ps1

#
# Update installed Neo4j service configuration
#
# Script to illustrate the update service command.
#
# 1. Configure heap size in neo4j.conf; install and run service. Check memory config in debug.log.
# 2. Stop service and change heap size in neo4j.conf.
# 3. Run update service command
# 4. Start service and check memory config in debug.log.

$neo4jDir = Get-Item "C:\Neo4j\neo4j-enterprise-3.3.3\"
$debugLog = Get-ChildItem $neo4jDir -Filter "logs\debug.log" -File
$configFile = Get-ChildItem $neo4jDir -Filter "conf\neo4j.conf" -File
$configBackup = ($configFile | Get-Content)

function Get-EffectiveMemoryConfig {
  Write-Output "[+] Checking debug.log for effective memory configuration"
  $debugLog | Get-Content | Select-String -Pattern '(Total|Max)\s+memory:' | Select -ExpandProperty line
}

function Add-Configuration {
  param($ConfigLines)
  $configFile | Add-Content -Value $configLines
}

function Restore-Configuration {
  $configFile | Set-Content -Value $configBackup
}

function Clear-DebugLog {
  $debugLog | Clear-Content
}

Join-Path $neo4jDir -ChildPath "bin\Neo4j-Management.psd1" | Import-Module -Force

$debugLog | Clear-Content

# Add memory configuration to neo4j.conf; install and start service
Add-Configuration @("", "dbms.memory.heap.initial_size=300m", "dbms.memory.heap.max_size=500m")
Invoke-Neo4j install-service -Verbose
Invoke-Neo4j start
Start-Sleep 10

# Check debug.log for the effective memory configuration
Get-EffectiveMemoryConfig

# Stop Neo4j and change the memory configuration
Invoke-Neo4j stop
Restore-Configuration
Add-Configuration @("", "dbms.memory.heap.initial_size=400m", "dbms.memory.heap.max_size=600m")

# Run update service command to update the service definition
Invoke-Neo4j update-service -Verbose

# Restart Neo4j
Invoke-Neo4j start
Start-Sleep 10

# Check debug.log for the effective memory configuration
Get-EffectiveMemoryConfig

# Clean up
Restore-Configuration
Invoke-Neo4j uninstall-service -Verbose