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![In honor of Lothar Collatz](https://static.wixstatic.com/media/d400f8_76e996340aa3449cbd42719751eb2776~mv2.jpg/v1/fill/w_43,h_27,fp_0.50_0.50,q_90,enc_auto/d400f8_76e996340aa3449cbd42719751eb2776~mv2.webp)
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![sqrt() and int()](https://static.wixstatic.com/media/d400f8_807eb9fc438b4ba1af14a59ce237ae57~mv2.jpg/v1/fill/w_43,h_42,fp_0.50_0.50,q_90,enc_auto/d400f8_807eb9fc438b4ba1af14a59ce237ae57~mv2.webp)
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![String Methods](https://static.wixstatic.com/media/d400f8_dc77ddfa62e24ab5ac06f323aab8c0ee~mv2.jpg/v1/fill/w_43,h_39,fp_0.50_0.50,q_90,enc_auto/d400f8_dc77ddfa62e24ab5ac06f323aab8c0ee~mv2.webp)
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![break and continue](https://static.wixstatic.com/media/d400f8_3845f4917b4d4a32b65efff51a43ae34~mv2.jpg/v1/fill/w_43,h_24,fp_0.50_0.50,q_90,enc_auto/d400f8_3845f4917b4d4a32b65efff51a43ae34~mv2.webp)
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![sleep()](https://static.wixstatic.com/media/d400f8_2339aca3304a4dd3a8131c3c85376a26~mv2.jpg/v1/fill/w_43,h_38,fp_0.50_0.50,q_90,enc_auto/d400f8_2339aca3304a4dd3a8131c3c85376a26~mv2.webp)
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![while i and for i in range ()](https://static.wixstatic.com/media/d400f8_9e1555345bdd4ce5a3ba4b75f1d2eb54~mv2.jpg/v1/fill/w_43,h_32,fp_0.50_0.50,q_90,enc_auto/d400f8_9e1555345bdd4ce5a3ba4b75f1d2eb54~mv2.webp)
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![Compact while()](https://static.wixstatic.com/media/d400f8_c608bd11e1394c07a1a6ba5de8de5f2d~mv2.jpg/v1/fill/w_43,h_37,fp_0.50_0.50,q_90,enc_auto/d400f8_c608bd11e1394c07a1a6ba5de8de5f2d~mv2.webp)
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![int()](https://static.wixstatic.com/media/d400f8_d036eb7aa781483e8c658f00ee6117f9~mv2.jpg/v1/fill/w_43,h_58,fp_0.50_0.50,q_90,enc_auto/d400f8_d036eb7aa781483e8c658f00ee6117f9~mv2.webp)
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![](https://static.wixstatic.com/media/d400f8_e6777d51a16445dba74356ceb72eaf83~mv2.jpg/v1/fill/w_250,h_250,fp_0.50_0.50,q_30,blur_30,enc_auto/d400f8_e6777d51a16445dba74356ceb72eaf83~mv2.webp)
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![](https://static.wixstatic.com/media/d400f8_2c8f91d5a18f4f36bcc4721bb603a7af~mv2.jpg/v1/fill/w_250,h_250,fp_0.50_0.50,lg_1,q_30,blur_30,enc_auto/d400f8_2c8f91d5a18f4f36bcc4721bb603a7af~mv2.webp)
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![Query Store properties](https://static.wixstatic.com/media/d400f8_8b2005c9a7d94675ac5ba546a663f760~mv2.png/v1/fill/w_43,h_24,fp_0.50_0.50,q_95,enc_auto/d400f8_8b2005c9a7d94675ac5ba546a663f760~mv2.webp)
![](https://static.wixstatic.com/media/d400f8_e16c95163d014881abfd2f0d812473f8~mv2.jpg/v1/fill/w_250,h_250,fp_0.50_0.50,q_30,blur_30,enc_auto/d400f8_e16c95163d014881abfd2f0d812473f8~mv2.webp)
![SQL Syntax](https://static.wixstatic.com/media/d400f8_e16c95163d014881abfd2f0d812473f8~mv2.jpg/v1/fill/w_43,h_24,fp_0.50_0.50,q_90,enc_auto/d400f8_e16c95163d014881abfd2f0d812473f8~mv2.webp)
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![Resource Pool](https://static.wixstatic.com/media/d400f8_f4742715e7dc4c69a3358833d277cfb3~mv2.jpg/v1/fill/w_43,h_24,fp_0.50_0.50,q_90,enc_auto/d400f8_f4742715e7dc4c69a3358833d277cfb3~mv2.webp)
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![Stored procedure with OUTPUT and READONLY](https://static.wixstatic.com/media/d400f8_a4935fb1b8f345b8ac509285457f6b68~mv2.jpg/v1/fill/w_43,h_35,fp_0.50_0.50,q_90,enc_auto/d400f8_a4935fb1b8f345b8ac509285457f6b68~mv2.webp)
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![Statistics updates](https://static.wixstatic.com/media/d400f8_997e0410797b41ecbe71b51045a27028~mv2.jpg/v1/fill/w_43,h_24,fp_0.50_0.50,q_90,enc_auto/d400f8_997e0410797b41ecbe71b51045a27028~mv2.webp)
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![Extended Event](https://static.wixstatic.com/media/d400f8_2a5c9f039a3e467ebfc47293873357bd~mv2.jpg/v1/fill/w_43,h_24,fp_0.50_0.50,q_90,enc_auto/d400f8_2a5c9f039a3e467ebfc47293873357bd~mv2.webp)
Archive
Tags
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![exec_query_stats](https://static.wixstatic.com/media/d400f8_02361c75f8704f25a13946d9d0b5160b~mv2.jpg/v1/fill/w_560,h_149,fp_0.50_0.50,q_90,enc_auto/d400f8_02361c75f8704f25a13946d9d0b5160b~mv2.webp)
exec_query_stats
You can also review the statistics collection at the query level by executing a query against the sys.dm_exec_query_stats DMV, which...
![Data Collector vs Activity Monitor](https://static.wixstatic.com/media/d400f8_2a406b0a7536482cafa67d77da5e3a65~mv2.webp)
Data Collector vs Activity Monitor
The data collector is a core component of the data collection platform for SQL Server 2019 (15.x) and the tools that are provided by SQL...
![Activity Monitor](https://static.wixstatic.com/media/d400f8_d019f8a1774140c0b250ee58b4ec0a0d~mv2.png/v1/fill/w_560,h_205,fp_0.50_0.50,q_95,enc_auto/d400f8_d019f8a1774140c0b250ee58b4ec0a0d~mv2.webp)
Activity Monitor
Overview The goal of monitoring databases is to assess how a server is performing. Effective monitoring involves taking periodic...
![](https://static.wixstatic.com/media/d400f8_f45b2e3c8e054172a738243d1b420ddc~mv2.jpg/v1/fill/w_250,h_250,fp_0.50_0.50,q_30,blur_30,enc_auto/d400f8_f45b2e3c8e054172a738243d1b420ddc~mv2.webp)
![Baseline performance](https://static.wixstatic.com/media/d400f8_f45b2e3c8e054172a738243d1b420ddc~mv2.jpg/v1/fill/w_500,h_384,fp_0.50_0.50,q_90,enc_auto/d400f8_f45b2e3c8e054172a738243d1b420ddc~mv2.webp)
Baseline performance
There are four tools that we can use to check performance metrics for the operating system and SQL Server: Dynamic management objects...
![](https://static.wixstatic.com/media/d400f8_f4742715e7dc4c69a3358833d277cfb3~mv2.jpg/v1/fill/w_250,h_250,fp_0.50_0.50,lg_1,q_30,blur_30,enc_auto/d400f8_f4742715e7dc4c69a3358833d277cfb3~mv2.webp)
![Resource Pool](https://static.wixstatic.com/media/d400f8_f4742715e7dc4c69a3358833d277cfb3~mv2.jpg/v1/fill/w_560,h_221,fp_0.50_0.50,q_90,enc_auto/d400f8_f4742715e7dc4c69a3358833d277cfb3~mv2.webp)
Resource Pool
You distribute the amount of memory, CPU, and IO available to SQL Server among resource pools as a means of reducing contention between...
![](https://static.wixstatic.com/media/d400f8_bceac1d4a0924c819967e27e75eccf4f~mv2.jpg/v1/fill/w_250,h_250,fp_0.50_0.50,q_30,blur_30,enc_auto/d400f8_bceac1d4a0924c819967e27e75eccf4f~mv2.webp)
![Database Throughput Unit (DTU)](https://static.wixstatic.com/media/d400f8_bceac1d4a0924c819967e27e75eccf4f~mv2.jpg/v1/fill/w_560,h_361,fp_0.50_0.50,q_90,enc_auto/d400f8_bceac1d4a0924c819967e27e75eccf4f~mv2.webp)
Database Throughput Unit (DTU)
A DTU is a single metric to represent CPU, memory, and IO thresholds. In other words, Queries' performance levels are measured as DTUs...
![](https://static.wixstatic.com/media/d400f8_9140a1eac1b74481b8a293076d22f81b~mv2.jpg/v1/fill/w_250,h_250,fp_0.50_0.50,q_30,blur_30,enc_auto/d400f8_9140a1eac1b74481b8a293076d22f81b~mv2.webp)
![Elastic Scale -- Sharding](https://static.wixstatic.com/media/d400f8_9140a1eac1b74481b8a293076d22f81b~mv2.jpg/v1/fill/w_560,h_250,fp_0.50_0.50,q_90,enc_auto/d400f8_9140a1eac1b74481b8a293076d22f81b~mv2.webp)
Elastic Scale -- Sharding
By using Elastic Scale for Azure SQL Database, you can manage your data in separate shards for which resource requirements can...
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