If you want a date stamp, you can change the ps ax stuff to look like this:
date +"%Y-%m-%d %H:%M:%S"|tr "\n" ":";ps ax|grep postgres:|grep -v grep|wc -l
On Mon, Aug 9, 2010 at 4:21 PM, Scott Marlowe <scott.marlowe@gmail.com> wrote:
> On Fri, Aug 6, 2010 at 6:19 PM, Tomeh, Husam <HTomeh@corelogic.com> wrote:
>> I was wondering if we can query/obtain the high-water mark of number of sessions or connections reached in a
Postgresdatabase. Is there a view or command that can provide this information. The pg_stat_database shows the current
numberof connections, but not the high-water mark a database had reached.
>
> It's a pretty easy thing to approximate with a shell script.
>
> while true;do ps ax|grep postgres:|grep -v grep|wc -l ;sleep 10;done >
> connects.log &
>
> then just tail the connects.log file. It's a dirty hack and it'll be
> a few counts over due to counting the postmaster and a few other
> processes, but it'll give you a good idea of what your system is
> doing. Add a date in there if you need to know the time it was
> happening.
>
--
To understand recursion, one must first understand recursion.