template1 being accessed

Started by drum.lucas@gmail.comabout 10 years ago5 messagesgeneral
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#1drum.lucas@gmail.com
drum.lucas@gmail.com

Hi there.

I'm currently using postgres 9.2.
As you can see below, my "template1" database was being accessed:

[image: Inline images 2]

That server is a 4-day-old backup DB - does a gzip of pg_dump, excluding
some tables; also 4-day old replication using WAL-archive with 345600s
delay; also file-level copies (excl. PG DB)

Why was the template1 database being accessed and now it's not anymore?

Cheers
Lucas

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Screen Shot 2016-04-05 at 3.59.22 PM.pngimage/png; name="Screen Shot 2016-04-05 at 3.59.22 PM.png"Download
#2John R Pierce
pierce@hogranch.com
In reply to: drum.lucas@gmail.com (#1)
Re: template1 being accessed

On 4/4/2016 9:04 PM, drum.lucas@gmail.com wrote:

I'm currently using postgres 9.2.
As you can see below, my "template1" database was being accessed:

500m is 1/2 access per whatever interval that graph is using. typically,
template1 is accessed when you do a create database if you don't specify
a different template.

its also possible some management software might use it as a default
place to connect so they can get a list of databases or whatever .

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#3Luca Ferrari
fluca1978@infinito.it
In reply to: John R Pierce (#2)
Re: template1 being accessed

(sorry, back to the list)

On Tue, Apr 5, 2016 at 6:11 AM, John R Pierce <pierce@hogranch.com> wrote:

its also possible some management software might use it as a default place
to connect so they can get a list of databases or whatever .

This is probably the most common case for continuos access to template1.

Luca

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#4Sameer Kumar
sameer.kumar@ashnik.com
In reply to: Luca Ferrari (#3)
Re: template1 being accessed

On Tue, 5 Apr 2016 14:35 Luca Ferrari, <fluca1978@infinito.it> wrote:

(sorry, back to the list)

On Tue, Apr 5, 2016 at 6:11 AM, John R Pierce <pierce@hogranch.com> wrote:

its also possible some management software might use it as a default

place

to connect so they can get a list of databases or whatever .

This is probably the most common case for continuos access to template1.

Or if you are using pgpool for connection pooling/load balancing, it might
connect to template1 and do health checks.

Luca

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#5John R Pierce
pierce@hogranch.com
In reply to: Sameer Kumar (#4)
Re: template1 being accessed

On 4/5/2016 5:35 PM, Sameer Kumar wrote:

Or if you are using pgpool for connection pooling/load balancing, it
might connect to template1 and do health checks.

we're literally talking about maybe one connect per DAY looking at those
graphs. a spike at 500m means one connect for 2 data points worth. a
spike at 330m means one per 3 points. the coarse grid units on that
graph were weeks, I don't know exactly what the fine data points were,
but not more more than a few per day.

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john r pierce, recycling bits in santa cruz

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