MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 07/14/01 through 07/20/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 42,887 2,386,823
MED90 8,698 156,516
MED85 6,518 68,654
MED80 5,599 28,673
MED75 5,245 32,534
MED66 5,276 25,572
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,596 53,756
2-4 a.m. 1,137 31,723
4-6 a.m. 325 16,665
6-8 a.m. 1,373 36,084
8-10 a.m. 5,202 169,759
10-12 a.m. 13,161 447,770
12-2 p.m. 12,968 467,292
2-4 p.m. 16,211 605,778
4-6 p.m. 12,328 473,766
6-8 p.m. 5,441 184,393
8-10 p.m. 2,600 129,559
10-12 p.m. 1,881 82,227
__________ _____________ _________________
Total: 74,223 2,698,772
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 496
Davis 694
Irvine 211
Los Angeles 631
Riverside 31
San Diego 499
San Francisco 996
Santa Barbara 292
Santa Cruz 16
Lawrence Berkeley 44
Lawrence Livermore 25
Los Alamos 3
MELWEB 66
Searchlight 5,497
Other - UC 64,336
Other-Network UC 386
_____
74,223
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 8,259
Davis 8,083
Irvine 2,189
Los Angeles 8,045
Riverside 154
San Diego 56,664
San Francisco 9,156
Santa Barbara 7,533
Santa Cruz 648
Lawrence Berkeley 1,145
Lawrence Livermore 1,547
Los Alamos 57
MELWEB 0
Searchlight 0
Other - UC 2,591,076
Other-Network UC 4,216
_____
2,698,772
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 0.9
Standard deviation in seconds 3.2
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 0.4
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:34
Average session length (minutes:seconds) 20:16
Longest session recorded (minutes:seconds) 207:09
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 468.1
Retrievals per search - standard deviation 6301.4
Percent of searches completed with 0 results 32.6%
Percent of searches entered that are long 0.0%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
SEARCH 74,223 11.7%
PRESENT 528,639 83.3%
INIT or CLOSE 31,417 5.0%
OTHER 347 0.1%
SEARCHes completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. SEARCHes No. Index Median Avg. Dev.
______ _________ ______ _______ ______ __________ _______
By index:
JOURNAL 5,216 5.0% 2,153 41.3% 4 1011.4 6856.9
PERSONAL AUTHOR 23,528 22.7% 6,601 28.1% 7 79.9 844.4
TITLE WORD 8,791 8.5% 3,405 38.7% 3 179.7 2375.6
SUBSET 134 0.1% 22 16.4% 17 287.4 1207.0
SUBJECT WORD 114 0.1% 58 50.9% 23 2525.0 16005.6
SUBJECT 1,950 1.9% 957 49.1% 36 524.5 2521.2
EXACT SUBJECT 3,982 3.8% 941 23.6% 33 589.4 4749.2
MAJOR SUBJECT 156 0.2% 50 32.1% 12 375.3 1011.6
EXACT MAJOR SUBJ 361 0.3% 46 12.7% 14 222.8 798.1
EXACT TITLE 563 0.5% 336 59.7% 1 37.5 193.3
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1,096 1.1% 366 33.4% 388 1687.7 3331.5
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 27 0.0% 12 44.4% 16 66.9 118.8
KEYWORD 42,245 40.8% 14,369 34.0% 16 978.2 9854.6
DATE 1,935 1.9% 443 22.9% 6 168.2 1696.3
LANGUAGE 5,423 5.2% 1,415 26.1% 29 461.3 3551.9
UNIQUE ID 165 0.2% 91 55.1% 1 2.2 3.1
ADDED 1,110 1.1% 556 50.1% 4 19.2 38.9
PUB TYPE 2,705 2.6% 662 24.5% 23 149.5 575.1
AUTHOR AFFIL. 686 0.7% 272 39.6% 10 116.8 1007.4
CHEMICAL NAME 3 0.0% 2 66.7% 223 223.0 0.0
EXACT CHEMICAL 0 0.0% 0 0.0% 0 0.0 0.0
AT 2,702 2.6% 793 29.3% 20 1087.4 11524.7
AGE 126 0.1% 31 24.6% 46 266.3 675.2
ISN 2 0.0% 2 100% 0 0.0 0.0
ARTICLE 91 0.1% 21 23.1% 142 411.4 628.4
XXS 237 0.2% 71 30.0% 21 160.2 458.2
XMXS 117 0.1% 39 33.3% 19 87.4 166.8
XS 2 0 0.0% 0 0.0% 0 0.0 0.0
MXS 2 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 17 0.0% 15 88.2% 108 108.0 151.3
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. SEARCHes No. Index Median Avg. Dev.
______ _________ ______ _______ ______ __________ _______
By number of indexes:
Multiple 20,659 27.8% 7,057 34.2% 7 311.0 4776.3
Single 53,564 72.2% 17,152 32.0% 16 838.0 8492.8
PRESENT commands, by type:
MARC 35.9%
OPAC 27.8%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS