Huge memory spike, no idea why, logging / debug tips?

[olaj]

I have just figured out that its something with ImageSharp that are causing some weird memory spikes on my Azure App Service.

Take a look at this baby 😨

And that is a 32gb Linux App Service Plan. So well, its a big one.

How can i try to debug this? I guess it could be whatever and it's pretty high traffic and its hundreds of thousands images that is served.

Any tips on where to start?

Ps. I just bought a developer license :) I read something about support there if you want to look into it in more detail.

[olaj]

I see a lot of these btw in the log.

DEBUG: Parser: IN_PACKETDEBUG: Parser: DecryptingDEBUG: Parser: pktLen:684,padLen:9,remainLen:672DEBUG: Parser: IN_PACKETDATADEBUG: Parser: DecryptingDEBUG: Parser: HMAC size:20DEBUG: Parser: IN_PACKETDATAVERIFYDEBUG: Parser: Verifying MACDEBUG: Parser: IN_PACKETDATAVERIFY (Valid HMAC)DEBUG: Parser: IN_PACKETDATAAFTER, packet: CHANNEL_DATA (0)DEBUG: Parser: IN_PACKETBEFORE (expecting 16)
DEBUG: Parser: IN_PACKETDEBUG: Parser: DecryptingDEBUG: Parser: pktLen:684,padLen:9,remainLen:672DEBUG: Parser: IN_PACKETDATADEBUG: Parser: DecryptingDEBUG: Parser: HMAC size:20DEBUG: Parser: IN_PACKETDATAVERIFYDEBUG: Parser: Verifying MACDEBUG: Parser: IN_PACKETDATAVERIFY (Valid HMAC)DEBUG: Parser: IN_PACKETDATAAFTER, packet: CHANNEL_DATA (0)DEBUG: Parser: IN_PACKETBEFORE (expecting 16)
DEBUG: Parser: IN_PACKETDEBUG: Parser: DecryptingDEBUG: Parser: pktLen:876,padLen:19,remainLen:864DEBUG: Parser: IN_PACKETDATADEBUG: Parser: DecryptingDEBUG: Parser: HMAC size:20DEBUG: Parser: IN_PACKETDATAVERIFYDEBUG: Parser: Verifying MACDEBUG: Parser: IN_PACKETDATAVERIFY (Valid HMAC)DEBUG: Parser: IN_PACKETDATAAFTER, packet: CHANNEL_DATA (0)DEBUG: Parser: IN_PACKETBEFORE (expecting 16)

Seems like its one of them every one second or so.

[JimBobSquarePants]

We've got a build out right now on our MyGet feed.
https://www.myget.org/feed/sixlabors/package/nuget/SixLabors.ImageSharp.Web/1.0.3-alpha.0.4

I'll be looking at getting a release out on NuGet also.

[olaj]

Great!

I saw a new spike this morning, I have deployed a new version now. Let me know if i notice anything strange with this one!

[olaj]

I've actually got a new spike after i deployed the new version. Maybe this wasn't it then 🤔

[JimBobSquarePants]

You'll need to profile the application. Currently there's no information in this thread actually identifying ImageSharp.Web as a culprit for anything nefarious. The spikes are also being claimed back so the GC is certainly handling whatever the cause is.

[JimBobSquarePants]

New NuGet release available. https://www.nuget.org/packages/SixLabors.ImageSharp.Web/1.0.3