Hello, Last year October we migrated to SQLserver 2014. And for the last two months we are noticing that full backups causing performance issues quite frequently. Certain queries that run during the backup time takes little longer than usual. And we don't observe this phenomenon other than the backup time. And those queries are very light weighted. It hardly takes a second to run. But during the backup it takes about 10 seconds to execute. Server has a memory of 384 GB ram and we configured 372 GB ram in the SQLserver maximum memory. Logical processors: 24. The server is running on cluster with San storage. The database is 695360.00 MB in size and we use Ola backup scripts to take backup in a network share. Reading through a lot of documents yesterday I find there could be something not correct with the SQLserver max memory settings. Can you please check my configuration and comment if we could improve the situation. Please let me know if you need any other information. Thank you very much. My Sys.configuration. 0 101 Maximum recovery interval in minutes 30 102 Allow updates to system tables 10 103 Number of user connections allowed 20 106 Number of locks for all users 20 107 Number of open database objects 20 109 Default fill factor percentage 20 114 Disallow returning results from triggers 31 115 Allow triggers to be invoked within triggers 11 116 Allow recursion for server level triggers 11 117 Allow remote access 00 124 default language 10 400 Allow cross db ownership chaining 10 503 Maximum worker threads 34096 505 Network packet size 31 518 show advanced options 10 542 Create DTC transaction for remote procedures 10 544 c2 audit mode 21033 1126 default full-text language 32049 1127 two digit year cutoff 30 1505 Memory for index create sorts (kBytes) 30 1517 Priority boost 210 1519 remote login timeout 1600 1520 remote query timeout 1-1 1531 cursor threshold 30 1532 set working set size 20 1534 user options 10 1535 affinity mask 365536 1536 Maximum size of a text field in replication. 10 1537 Tape retention period in days 35 1538 cost threshold for parallelism 30 1539 maximum degree of parallelism 31024 1540 minimum memory per query (kBytes) 3-1 1541 maximum time to wait for query memory (s) 30 1543 Minimum size of server memory (MB) 3380928 1544 Maximum size of server memory (MB) 30 1545 Maximum estimated cost allowed by query governor 30 1546 User mode scheduler uses lightweight pooling 20 1547 scan for startup stored procedures 20 1549 affinity64 mask 30 1550 affinity I/O mask 20 1551 affinity64 I/O mask 20 1555 Transform noise words for full-text query 30 1556 Use precomputed rank for full-text query 360 1557 DB connection timeout for full-text protocol handler (s) 30 1562 CLR user code execution enabled in the server 14 1563 Maximum crawl ranges allowed in full-text indexing 30 1564 Number of reserved full-text notifications buffers 3100 1565 Max number of full-text notifications buffers 30 1566 Number of reserved full-text crawl buffers 3100 1567 Max number of full-text crawl buffers 31 1568 Enable or disable the default trace 31 1569 Blocked process reporting threshold 30 1570 Recovery policy for DTC transactions with unknown outcome 31 1576 Dedicated Admin Connections are allowed from remote clients 10 1577 Common Criteria compliance mode enabled 20 1578 Enable or disable EKM provider 31 1579 Enable compression of backups by default 10 1580 Sets the FILESTREAM access level 10 1581 When this option is set, plan cache size is further reduced for single-use adhoc OLTP workload. 30 1582 Default hash bucket count for the access check result security cache 30 1583 Default quota for the access check result security cache 30 1584 Enable checksum of backups by default 11 16384 Enable or disable Agent XPs 31 16386 Enable or disable Database Mail XPs 31 16387 Enable or disable SMO and DMO XPs 30 16388 Enable or disable Ole Automation Procedures 30 16390 Enable or disable command shell 30 16391 Enable or disable Ad Hoc Distributed Queries 30 16392 Enable or disable Replication XPs 30 16393 Enables contained databases and contained authentication 1select type, virtual_memory_reserved_kb,virtual_memory_committed_kb,awe_allocated_kb from sys.dm_os_memory_clerks where virtual_memory_reserved_kb > 0 order by virtual_memory_reserved_kb descResults of the above queryMEMORYCLERK_SQLBUFFERPOOL 199630896 524288 8797512MEMORYCLERK_SQLCLR 9450368 10212 0MEMORYCLERK_SOSMEMMANAGER 1394380 1244876 149448OBJECTSTORE_LOCK_MANAGER 1050624 1050624 0MEMORYCLERK_SQLSTORENG 9792 0 9792MEMORYCLERK_XE_BUFFER 5888 5888 0MEMORYCLERK_XE_BUFFER 2944 2944 0
↧