There's a handful of hidden columns like Xmin and Xmax per row that you're not accounting for, header info per page, reserve space, free space... The physical size on disk is reasonable.
Otherwise you can reduce the number of rows by cleaning up and moving out old data, reduce the width of each row by getting rid of any unused columns or switching to narrower data types, or drop unused indexes. If none of that works for you then you're going to have to adjust your disk budget.
On Sun, Aug 26, 2018, 12:37 AM Raghavendra Rao J S V <raghavendrajsv@xxxxxxxxx> wrote:
Thank you very much for your prompt response.Please guide me below things.How to check rows got corrupted?How to check table got corrupted?How to check which row is occupied more space in the table?Is this expected?On Sun, 26 Aug 2018 at 09:46, Adrian Klaver <adrian.klaver@xxxxxxxxxxx> wrote:On 08/25/2018 08:36 PM, Raghavendra Rao J S V wrote:
> Hi All,
>
> One of our database size is 50gb. Out of it one of the table has
> 149444622 records. Size of that table is 14GB and its indexes size is 16GB.
> Total size of the table and its indexes are 30GB. I have perfomred the
> below steps on that table.
>
> reindex table table_name;
>
> vacuum full verbose analyze on table_name;
>
> But still the size of the table and its indexes size are not reduced.
> Please guid me. How to proceed further.
Rough approximation:
14,000,000,000 / 150,000,000 = 93 bytes/record.
I am not seeing an issue. If you want to reduce the size of the table
remove rows.
>
> Structure of the table as below.
>
> Column | Type | Modifiers | Storage |
> Stats target | Description
> ---------------------+------------------+-----------+---------+--------------+-------------
> col1| bigint | | plain | |
> col2 | double precision | | plain | |
> col3| double precision | | plain | |
> col4| double precision | | plain | |
> col5| double precision | | plain | |
> col6date| date | | plain | |
> tkey | integer | | plain | |
> cid | integer | | plain | |
> rtypeid | integer | | plain | |
> rid | integer | | plain | |
> ckey | bigint | | plain | |
> Indexes:
> "idx_tab_cid" btree (cid)
> "idx_tab_ckey" btree (ckey)
> "idx_tab_col6date" btree (col6date)
> "idx_tab_rid" btree (rid)
> "idx_tab_rtype_id" btree (rtypid)
> "idx_tab_tkey" btree (tkey)
>
>
> --
> Regards,
> Raghavendra Rao J S V
> Mobile- 8861161425
--
Adrian Klaver
adrian.klaver@xxxxxxxxxxx
--Regards,
Raghavendra Rao J S V
Mobile- 8861161425
