Hi.
I have the same issue.
>From statistic :
Last updated    Total number of entities        Size of all entities
3:56:43 ago     140,994                         260 MBytes
But in quote:
Total Stored Data                96%     0.96 of 1.00 GBytes

In cron I move data (with deletion) from table with text fields,
sorted by key (no special and witout indexes) to 4 tables with
smollest size of the data.
Source table:
Total Number of Mail Entities:  Average Size of Entity:
436                                             411 KBytes
Property        Type         Size
body            Text             175 MBytes (100% of the entity)
date             String  21 KBytes (0% of the entity)
sender   String  20 KBytes (0% of the entity)
subject  String  15 KBytes (0% of the entity)
added_on         Date/Time       11 KBytes (0% of the entity)
Metadata                          26 KBytes (0% of the entity)

Result tables:
Total Number of MarketHistoryBuy Entities:      Average Size of Entity:
34,578                                                   699 Bytes

Total Number of MarketHistorySell Entities:     Average Size of Entity:
43,494                                                  706 Bytes

Total Number of MarketStatsBuy Entities:        Average Size of Entity:
27,028                                                  543 Bytes

Total Number of MarketStatsSell Entities:       Average Size of Entity:
35,205                                                  549 Bytes


inserted and searched by key

Total indexes:
Entity and Indexes                      Status
MarketStatsBuy
solarSystemID ▲ , typeID ▲      Serving
typeID ▲ , solarSystemID ▲      Serving
MarketStatsSell
solarSystemID ▲ , typeID ▲      Serving
typeID ▲ , solarSystemID ▲      Serving
(I've deleted all other indexes hour or two earlyer.

Data amount in statistic decreased day to day, but in quote -
increased.


On 16 дек, 14:15, "Nick Johnson (Google)" <[email protected]>
wrote:
> Hi bsb,
>
> - Each entity has a key that needs to be stored in various places. The key
> consists of your App ID, kind name, and name or ID, along with the usual
> Protocol Buffer overhead.
> - Each field is stored in the Protocol Buffer as a key, value pair. The
> total size for this is roughly len(key) + len(data) + 10 bytes (this last
> quantity can vary depending on the type and size of the property).
> - The automatic indexes also take up space. For each indexed field, they
> need roughly the length described above, plus the length of the App ID, plus
> the key for the entity. There are automatic indexes for single properties in
> ascending and descending order.
>
> Between the various fields that need to be stored and indexed, the size of
> an entity and all its indexes can easily reach 1KB, which fits your 1GB
> figure for a million of them.
>
> -Nick
>
>
>
>
>
> On Wed, Dec 16, 2009 at 11:53 AM, bsb <[email protected]> wrote:
> > I know this is an old story, but I still don't get it: I have ~1M
> > entities, each one consists of a date, a reference and 2 ints. I have
> > no custom indices or anything. The datastore statistics say that I'm
> > using 188MB for the entities. The quota view tells me I'm using a
> > whooping 1GB of disk space. How the *** does that work?
>
> > --
>
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> --
> Nick Johnson, Developer Programs Engineer, App Engine
> Google Ireland Ltd. :: Registered in Dublin, Ireland, Registration Number:
> 368047

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