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 <mallit333(at)gmail(dot)com> 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 <mallit333(at)gmail(dot)com <mailto:mallit333(at)gmail(dot)com>> 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 <rui(at)crazybean(dot)net <mailto:rui(at)crazybean(dot)net>> 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 <mallit333(at)gmail(dot)com <mailto:mallit333(at)gmail(dot)com>> 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.
>