# Why does canister's memory get bigger?

**URL:** <https://forum.dfinity.org/t/why-does-canisters-memory-get-bigger/10739>\
**Category:** Developers\
**Created:** [February 7, 2022, 5:22am UTC](https://forum.dfinity.org/t/why-does-canisters-memory-get-bigger/10739 "2022-02-07T05:22:16Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![chrisrambo](https://sea1.discourse-cdn.com/flex023/user_avatar/forum.dfinity.org/chrisrambo/32/3529_2.png) [@chrisrambo](https://forum.dfinity.org/u/chrisrambo)\
**Post date:** [February 7, 2022, 5:22am UTC](https://forum.dfinity.org/t/why-does-canisters-memory-get-bigger/10739/1 "2022-02-07T05:22:16Z")

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I recorded the status of the canister and found that after some operations（call canister’s method for add data and delete data）, the memory became larger and there were more cycles. But now I don’t know how to reproduce this situation. What is the reason for this phenomenon?

 ![user-canister-内存变大了](https://us1.discourse-cdn.com/flex023/uploads/dfn/original/2X/6/6e96fa19ce444eab0e79452c118b5b9f17e9202e.jpeg)

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**Author:** ![jzxchiang](https://sea1.discourse-cdn.com/flex023/user_avatar/forum.dfinity.org/jzxchiang/32/2592_2.png) [@jzxchiang](https://forum.dfinity.org/u/jzxchiang)\
**Post date:** [February 7, 2022, 5:38am UTC](https://forum.dfinity.org/t/why-does-canisters-memory-get-bigger/10739/2 "2022-02-07T05:38:18Z")

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The memory size increase is explained [here](https://forum.dfinity.org/t/motoko-array-memory/5324/5).

No idea why the cycle balance is increasing though. You sure nobody is adding more cycles to it?