Re: How to know transaction count in hour basic

That is a simple helper function to create a numeric format string for to_char():


create or replace function numeric_format(_percision int, _scale int)
returns varchar(100)
as $$
declare 
 _grpCnt int;
 _decCnt int;
begin
    _grpCnt := ((_percision - _scale) / 3);
    _decCnt := ((_percision - _scale) % 3);

    return trim(leading ',' from (repeat('9', _decCnt) || repeat('G999', _grpCnt) || 'D' || repeat('9', _scale)));
end;
$$ language plpgsql
  immutable returns null on null input
;

> On Oct 31, 2019, at 10:05 AM, mallikarjun t <[email protected]> wrote:
> 
> Dear Team, 
> 
> How this function works, it is not working it is throwing error message ,
> 
> <image.png>
> 
> Kindly check that, and revert back.
> 
> Regards,
> Mallikarjunarao,
> +91-8142923383.
> 
> On Thu, Oct 31, 2019 at 5:04 PM mallikarjun t <[email protected] <mailto:[email protected]>> wrote:
> Dear Team,
> 
> Thanks for your support. I will check.
> 
> 
> Regards,
> Mallikarjunarao,
> +91-8142923383.
> 
> On Wed, Oct 30, 2019 at 8:59 PM Rui DeSousa <[email protected] <mailto:[email protected]>> wrote:
> You need to capture the value at the starting and ending period that you’re interested in and then calculate the delta.
> 
> 
> I export all the stats tables out every minute and put them into history table on a different system — then query any period of interest.  Sorta like Oracle’s stats pack.
> 
> There are also monitoring tools that do this all for you already. 
> 
> i.e.  This is the function I would use to get the information you’re looking for:
> 
> /* 
> Query Example:
> 
> select period_start
>   , period_end
>   , to_char(xact_commit + xact_rollback, numeric_format(10, 0)) as tran_cnt
>   , to_char(txid_cnt, numeric_format(10, 0)) as txid_cnt
>   , pg_size_pretty((blks_read + blks_hit) * 16 * 1024) as buf_read
>   , pg_size_pretty(blks_read * 16 * 1024) as fs_read
>   , to_char(blks_hit::numeric / (blks_read + blks_hit) * 100, '999D9999%') as buf_pct
>   , to_char(temp_files, numeric_format(15, 0)) as temp_files
>   , pg_size_pretty(temp_bytes) as tmp_tbl
>   , to_char(tup_returned, numeric_format(15, 0)) as tup_returned
>   , to_char(tup_inserted, numeric_format(15, 0)) as tup_inserted
>   , to_char(tup_updated, numeric_format(15, 0)) as tup_updated
>   , to_char(tup_deleted, numeric_format(15, 0)) as tup_deleted
> from get_database_stat(‘dynamo', '2018-06-26'::date, '2018-06-30'::date, 60)
> ;
> 
> */
> 
> create or replace function get_database_stat(_database name, _start_time timestamp(0) with time zone, _end_time timestamp(0) with time zone, _interval int default 1)
> returns table (
>   period_start     timestamp(0) with time zone,
>   period_end       timestamp(0) with time zone,
>   xact_commit      bigint,
>   xact_rollback    bigint,
>   txid_cnt         bigint,
>   blks_read        bigint,
>   blks_hit         bigint,
>   tup_returned     bigint,
>   tup_fetched      bigint,
>   tup_inserted     bigint,
>   tup_updated      bigint,
>   tup_deleted      bigint,
>   conflicts        bigint,
>   temp_files       bigint,
>   temp_bytes       bigint,
>   deadlocks        bigint,
>   blk_read_time    double precision,
>   blk_write_time   double precision
> ) as $$
> declare
>   _offset_factor int;
> begin
>   _offset_factor := (_interval * 60) - ((extract(epoch from date_trunc('minutes', _start_time)))::int % (_interval * 60));
> 
>   return query
>     select lag(s.hist_stat_time) over (partition by s.datname, s.stats_reset order by s.hist_stat_time) as period_start
>       , s.hist_stat_time as period_end
>       , (s.xact_commit - lag(s.xact_commit) over (partition by s.datname, s.stats_reset order by s.hist_stat_time)) as xact_commit
>       , (s.xact_rollback - lag(s.xact_rollback) over (partition by s.datname, s.stats_reset order by s.hist_stat_time)) as xact_rollback
>       , s.xact_txid - lag(s.xact_txid) over (partition by s.datname, s.stats_reset order by s.hist_stat_time) as txid_cnt
>       , (s.blks_read - lag(s.blks_read) over (partition by s.datname, s.stats_reset order by s.hist_stat_time)) as blks_read
>       , (s.blks_hit - lag(s.blks_hit) over (partition by s.datname, s.stats_reset order by s.hist_stat_time)) as blks_hit
>       , (s.tup_returned - lag(s.tup_returned) over (partition by s.datname, s.stats_reset order by s.hist_stat_time)) as tup_returned
>       , (s.tup_fetched - lag(s.tup_fetched) over (partition by s.datname, s.stats_reset order by s.hist_stat_time)) as tup_fetched
>       , (s.tup_inserted - lag(s.tup_inserted) over (partition by s.datname, s.stats_reset order by s.hist_stat_time)) as tup_inserted
>       , (s.tup_updated - lag(s.tup_updated) over (partition by s.datname, s.stats_reset order by s.hist_stat_time)) as tup_updated
>       , (s.tup_deleted - lag(s.tup_deleted) over (partition by s.datname, s.stats_reset order by s.hist_stat_time)) as tup_deleted
>       , (s.conflicts - lag(s.conflicts) over (partition by s.datname, s.stats_reset order by s.hist_stat_time)) as conflicts
>       , (s.temp_files - lag(s.temp_files) over (partition by s.datname, s.stats_reset order by s.hist_stat_time)) as temp_files
>       , (s.temp_bytes - lag(s.temp_bytes) over (partition by s.datname, s.stats_reset order by s.hist_stat_time)) as temp_bytes
>       , (s.deadlocks - lag(s.deadlocks) over (partition by s.datname, s.stats_reset order by s.hist_stat_time)) as deadlocks
>       , (s.blk_read_time - lag(s.blk_read_time) over (partition by s.datname, s.stats_reset order by s.hist_stat_time)) as blk_read_time
>       , (s.blk_write_time - lag(s.blk_write_time) over (partition by s.datname, s.stats_reset order by s.hist_stat_time)) as blk_write_time
>     from hist_stat_database s
>     where s.datname = _database
>       and s.hist_stat_time >= _start_time
>       and s.hist_stat_time <= _end_time
>       and ((extract(epoch from date_trunc('minutes', s.hist_stat_time)))::int + _offset_factor) % (_interval * 60) = 0
>     order by s.hist_stat_time
>     offset 1
>   ;
> end;
> $$ language plpgsql
>   stable
> ;
> 
> 
> 
>> On Oct 30, 2019, at 10:13 AM, mallikarjun t <[email protected] <mailto:[email protected]>> wrote:
>> 
>> Dear Team,
>> 
>> How to check, how many transactions are committed in one hour?
>> 
>> In database level pg_stat_database xact_commit column is there,this is giving only count.
>> 
>> How to get count for hour basis and minutes and seconds basis, how many transactions are committed?
>> 
>> How to check?
>> 
>> Regards,
>> Mallikarjunarao,
>> +91-8142923383.
>