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Question

Why DDB Q&I Times are different across partitions

  • May 29, 2026
  • 2 replies
  • 30 views

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So we have 4 new beefy media agents all identical with multiple SSD drives in each. We host multiple DDB’s on these in a 4 way grid. Details below for 2 of the DDBs.

DDB117:

MA01 - partition 1 - 3.77TB. 280,012,213 unique blocks, 800us Q&I time

MA02 - partition 2 - 3.75TB, 280,013,171 unique blocks, 656us Q&I time

MA03 - partition 3 - 3.68TB, 280,000,417 unique blocks, 682us Q&I time

MA04 - partition 4 - 1.71TB, 279,998,959 unique blocks, 86us Q&I time

 

DDB118: (Same hardware)

MA01 - partition 1 - 3.77TB, 316,416,711 unique blocks, 198us Q&I time

MA02 - partition 2 - 3.75TB, 316,456,547 unique blocks, 176us Q&I time

MA03 - partition 3 - 3.68TB, 316,508,932 unique blocks, 181us Q&I time

MA04 - partition 4 - 1.71TB, 314,526,253 unique blocks, 85us Q&I time

 

Any ideas on why MA04 shows much lower Q&I times than MA01/02/03 in the same DDB? Also, why would DDB117 have such higher Q&I times than DDB118?

 

Thanks.

2 replies

Onno van den Berg
Community All Star
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What about the rest of the specs are those also identical as well? What about the load e.g. CPU/RAM? Any differences in AV config? Is the DDB version the same and did you check for all maintenance options? Did you check job distribution? 


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  • Author
  • Apprentice
  • June 1, 2026

Server specs are identical across the board. No AV differences as well.  DDB versions are the same. MA01 is the default MA but we are set to round robin. I changed the preferred from Ma01 to Ma04 and that has helped some.