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Moving it up any stairs can also be dangerous if you don’t have the proper training, assistance, and equipment. We don’t have a collector yet, but we can start putting in some of the logging now. Also, allocation is the only time when you really need some freed up memory so that you can reuse it. Simplest proposal at initdb time could be to pass a flag saying which is needed and then have that track and do initialization and setting up the collation from that provider. Packagers could build against later version and then users would be able to choose version at initdb time. Andres- Suspect overhead is going to be too high and will need a completely different mechanism because collecting all that data for all wait events and most of the time it's not going to be needed and is just expensive. As soon as you do any reads it gets much more expensive and you need to do reads in the data collection path. The pool of developers who have an interest in maintaining and contributing to this library would be much larger because it would be available for use across a wide range of tools.

Alvaro- Would be good to see what the system is doing in more granular way but wait event isn't the best way to get at that and maybe there should be another way that's a completely different approach which could be turned on/off for a specific operation that doesn't cause too much overhead. Not sure if there is semantic issue with that. Andres- Maybe just extension name would be fine, just write to disk on shutdown, maybe a bit more space but probably not an issue really. Andres- When you store it on disk need to keep track of what extension added the stats. Bertnard- During 10s you have a bunch of different wait events if some aren't valid maybe is ok but you need to know that it's valid. Bertnard- Most of the time you have to guess when you have a waitevent but you don't know what is happening. Bertnard- Is it work it to spend time on this? Bertnard- If you want to reset stats then maybe have it in a different file.. Aside from balls and cues, depending on the games you want to play, you’ll need a rack or numerous racks, a pool table, or a snooker table.

Once recovered, they will also check the pool table level and readjust it to make sure it’s perfectly flat. GCC made attempts earlier, but when a function returns an aggregate (e.g. struct) type it’s more efficient to decompose that into multiple scalars. Packagers would then package up multiple versions and make them available concurrently and keep them all forever and users could then choose the one for them and keep it static. To compensate for that, chips have multiple layers of caching. Andres- Have to be careful to not make it vastly more expensive. Andres- Depends on the details. Bertnard- Add more details to wait events, for example when buffer content could have relfilenode and other information included. Won't be the same details for each wait event and so we have different data we want to add and the number of different details. The more detail you add such as how extensions may want to include means you have to consider how to display it. Eventually we will log some other operations during the collection, so we’ll also want to know when the show’s over. When you read you need to know if what you read is actually valid or not.

Peter E- Maybe say "here are the things thinking about adding, this this and this" and if it fits in 8 bytes then maybe ok but if it doesn't then may need another idea. Peter E- Is 8 bytes enough? Peter E- Would be really frustrating if you get the wrong data and take action based on incorrect data. Peter E- Is consistency really required in all these cases, maybe we don't need to have it be completely consistent? Issue with consistency. Currently we have wait event and wait event type with int32 and that is always consistent but if additional information is included then not sure about how to keep it consistent. Maybe could write to ring buffer and could from application side read that and build a history of what's been going on instead of having to poll that information. Alvaro- Is waitevent the best way to store this information. Tomas- Is there a way to track the version and on server start check the version and refuse to start if needed. Andres- If you want the granularity where wait events because that's why wait events are there. Low sheen finishes such as flat or eggshell are a must.

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