Re: How different is AWS-RDS postgres?

From: Philip Semanchuk <philip(at)americanefficient(dot)com>
To: Rob Sargent <robjsargent(at)gmail(dot)com>
Cc: Ian Harding <harding(dot)ian(at)gmail(dot)com>, Ron <ronljohnsonjr(at)gmail(dot)com>, pgsql-general(at)lists(dot)postgresql(dot)org
Subject: Re: How different is AWS-RDS postgres?
Date: 2021-05-27 13:45:30
Message-ID: AEF79379-0271-4D58-9DB3-2E3EA23348AD@americanefficient.com
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> On May 26, 2021, at 10:04 PM, Rob Sargent <robjsargent(at)gmail(dot)com> wrote:
>
>
>
>> On May 26, 2021, at 4:37 PM, Ian Harding <harding(dot)ian(at)gmail(dot)com> wrote:
>>
>> 
>> There is an option to send the logs to cloudwatch which makes it less awful to look at them.
> I have that but precious little of interest there. Lots of autovac, a smattering of hints to increase wal size!? I have yet to spot anything which corresponds to the “I/O failure” which the middle ware gets.
>
> I don’t have query logging on, but I do see reports from my psql session fat-fingering.
>
> As to the logs UI, the search is pretty feeble; I don’t understand why there are four channels of logs; the graphs are wearing the same rose-coloured as the logs.
> And 24 hours without a peep from AWS support. (I don’t call mailing me what I sent them “contact”.)
>
> My guess right now is that the entire tomcat connection pool is in a single transaction? That’s the only way the tables could disappear. I am making separate calls to JDBC getConnection () for each doPost.

We used Aurora (AWS hosted Postgres) and I agree that Cloudwatch search is pretty limited. I wrote a Python script to download cloudwatch logs to my laptop where I can use proper tools like grep to search them. It’s attached to this email. It’s hacky but not too terrible. I hope you find it useful.

Cheers
Philip

Attachment Content-Type Size
get_aws_logs.py text/x-python-script 2.9 KB

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