Hi guys,
I am running into out of memory issues with my Gatling script (version 2.0.0-SNAPSHOT) when trying to run a high load endurance test (for 48 hours). After approximately 12 hour I see throughput diminishing and eventually Gatling goes out of memory. Based on a post I found on google groups I use the following JVM arguments:
-Xms4g
-Xmx7g
-XX:NewSize=2g
-XX:+HeapDumpOnOutOfMemoryError
-XX:+AggressiveOpts
-XX:+OptimizeStringConcat
-XX:+UseFastAccessorMethods
-XX:+UseParNewGC
-XX:+UseConcMarkSweepGC
-XX:+CMSParallelRemarkEnabled
-XX:+CMSClassUnloadingEnabled
-XX:CMSInitiatingOccupancyFraction=75
-XX:+UseCMSInitiatingOccupancyOnly
-XX:SurvivorRatio=8
-XX:MaxTenuringThreshold=1
Could the out of memory be caused by these JVM settings? Or is it somehow due to the way my script is set up (randomSwitch in during loop)?
My script looks like this:
import io.gatling.core.Predef._
import io.gatling.http.Predef._
class Search extends Simulation {
println("Heap: " + (Runtime.getRuntime().maxMemory() / 1024 / 1024))
val httpProtocol = http
.baseURL(“http://www.host.com”)
.acceptHeader("""/""")
.acceptEncodingHeader(""“gzip, deflate”"")
.acceptLanguageHeader(""“en-us,en;q=0.5"”")
.userAgentHeader(""“Mozilla/5.0 (Windows NT 5.2; rv:7.0.1) Gecko/20100101 Firefox/7.0.1"”")
val headers_1 = Map(""“Content-Type”"" → “”“application/json; charset=utf-8"”")
val headers_8 = Map(
“”“Content-Type”"" → “”“application/json; charset=utf-8"”",
“”“X-http-Method-Override”"" → “”“PUT”"")
val headers_12 = Map(
“”“Accept-Encoding”"" → “”“gzip,deflate”"",
“”“Content-Type”"" → “”“application/json; charset=utf-8"”",
“”“X-HTTP-Method-Override”"" → “”“PUT”"")
val step01 =
exec(http(“POS_Settings”)
.get("""/some/url""")
.check(regex(""“currencyPrecision”"").exists))
.exec(http(“FlightProductCatalogue”)
.post("""/some/url""")
.check(regex(""“destination”"").exists)
.check(regex(""".“id”:"([^"]+)",.""").saveAs(“resource_ID”))
.headers(headers_1)
.body(RawFileBody(“FlightProductCatalogue.txt”)))
.exec(http(“Lowestprice_MiniMultimonth_Teaser”)
.get("""/some/url""")
.check(regex(""“originAirport”"").exists))
.exec(session =>
session.set(“currentTimestamp”, System.currentTimeMillis)
)
.exec(http(“Fare_Teaser”)
.get("""/some/url""")
.check(regex(""“originAirport”"").exists))
val step02 =
exec(http(“Lowestprice_Multimonth”)
.get("""/some/url""")
.check(regex(""“originAirport”"").exists))
val step03 =
exec(http(“Lowestprice_OutboundMonth”)
.get("""/some/url""")
.check(regex(""“originAirport”"").exists))
.exec(http(“Outbound_Day”)
.post("""/some/url""")
.headers(headers_1)
.body(RawFileBody(“Outbound_Day.txt”))
.check(regex(""“destination”"").exists))
val step04 =
exec(http(“LowestpriceFlights_Outbound”)
.get("""/some/url""")
.check(regex(""“originAirport”"").exists))
.exec(http(“Outbound_Connection”)
.post("""/some/url""")
.headers(headers_8)
.body(RawFileBody(“Outbound_Connection.txt”))
.check(regex(""“originAirport”"").exists))
val step05 =
exec(http(“Lowestprice_InboundMonth”)
.get("""/some/url""")
.check(regex(""“originAirport”"").exists))
.exec(http(“Inbound_Day”)
.post("""/some/url""")
.headers(headers_1)
.body(RawFileBody(“Inbound_Day.txt”))
.check(regex(""“originAirport”"").exists))
val step06 =
exec(http(“LowestpriceFlights_Inbound”)
.get("""/some/url""")
.check(regex(""“originAirport”"").exists))
.exec(http(“Inbound_Flight”)
.post("""/some/url""")
.headers(headers_12)
.body(RawFileBody(“Inbound_Flight.txt”))
.check(regex(""“originAirport”"").exists))
.exec(http(“Timetothink”)
.get("""/some/url""")
.check(status.is(404)))
.exec(http(“Pricedetails”)
.get("""/some/url""")
.check(regex(""“amountsPerPassengerType”"").exists))
val scn = scenario(“search”)
.during(172800) {
randomSwitch(
30.0 → exec(step01, step02, step03, step04, step05, step06)
