MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 01/06/01 through 01/12/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 43,815 2,217,547
MED90 9,559 204,605
MED85 6,994 75,935
MED80 5,893 41,719
MED75 5,468 20,455
MED66 5,568 26,171
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,680 29,293
2-4 a.m. 587 10,462
4-6 a.m. 201 6,526
6-8 a.m. 1,029 23,455
8-10 a.m. 5,646 198,695
10-12 a.m. 14,348 477,342
12-2 p.m. 13,702 444,271
2-4 p.m. 16,912 542,849
4-6 p.m. 12,435 446,346
6-8 p.m. 5,776 214,218
8-10 p.m. 3,025 112,051
10-12 p.m. 1,956 80,924
__________ _____________ _________________
Total: 77,297 2,586,432
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 195
Davis 1,200
Irvine 173
Los Angeles 1,156
Riverside 22
San Diego 821
San Francisco 953
Santa Barbara 62
Santa Cruz 10
Lawrence Berkeley 51
Lawrence Livermore 45
Los Alamos 0
MELWEB 63,666
Searchlight 8,141
Other - UC 99
Other-Network UC 703
_____
77,297
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 15,554
Davis 7,382
Irvine 1,967
Los Angeles 9,012
Riverside 154
San Diego 6,604
San Francisco 10,040
Santa Barbara 692
Santa Cruz 54
Lawrence Berkeley 652
Lawrence Livermore 355
Los Alamos 0
MELWEB 2,522,705
Searchlight 3
Other - UC 292
Other-Network UC 10,966
_____
2,586,432
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 0.8
Standard deviation in seconds 3.0
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.1
Standard deviation in seconds 0.3
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:30
Average session length (minutes:seconds) 20:07
Longest session recorded (minutes:seconds) 191:44
Average number of searches completed per session 0.0
Retrievals per search - median 2.0
Retrievals per search - average 426.7
Retrievals per search - standard deviation 6982.5
Percent of searches completed with 0 results 33.8%
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 77,297 13.4%
PRESENT 467,675 81.0%
INIT or CLOSE 31,973 5.5%
OTHER 410 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 6,347 5.7% 2,477 39.0% 2 460.1 2649.3
PERSONAL AUTHOR 25,155 22.7% 6,736 26.8% 7 83.9 950.4
TITLE WORD 9,218 8.3% 3,377 36.6% 2 221.7 2231.1
SUBSET 156 0.1% 43 27.6% 23 574.9 2510.7
SUBJECT WORD 125 0.1% 70 56.0% 9 570.3 3328.0
SUBJECT 2,486 2.2% 1,306 52.5% 12 646.4 4381.6
EXACT SUBJECT 4,446 4.0% 1,332 30.0% 36 504.3 3021.5
MAJOR SUBJECT 156 0.1% 69 44.2% 51 363.9 998.7
EXACT MAJOR SUBJ 363 0.3% 90 24.8% 21 261.6 795.6
EXACT TITLE 631 0.6% 403 63.9% 1 30.8 306.9
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1,022 0.9% 273 26.7% 380 1919.3 4655.0
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 16 0.0% 2 12.5% 51 322.2 539.4
KEYWORD 42,929 38.7% 15,434 35.9% 18 955.5 11526.6
DATE 2,152 1.9% 540 25.1% 5 94.4 467.6
LANGUAGE 6,065 5.5% 2,025 33.4% 27 394.0 2388.4
UNIQUE ID 348 0.3% 62 17.8% 1 1.0 0.0
ADDED 1,052 0.9% 1,052 100% 0 0.0 0.0
PUB TYPE 3,117 2.8% 1,005 32.2% 20 200.8 1048.1
AUTHOR AFFIL. 691 0.6% 320 46.3% 9 230.9 3004.1
CHEMICAL NAME 49 0.0% 36 73.5% 6 1570.6 3729.5
EXACT CHEMICAL 8 0.0% 4 50.0% 5 57.8 108.9
AT 3,721 3.4% 1,407 37.8% 16 327.8 1677.9
AGE 175 0.2% 29 16.6% 54 147.7 435.9
ISN 1 0.0% 1 100% 0 0.0 0.0
ARTICLE 69 0.1% 21 30.4% 81 1162.2 3354.6
XXS 231 0.2% 127 55.0% 13 215.6 852.9
XMXS 56 0.1% 42 75.0% 31 86.9 151.7
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 15 0.0% 9 60.0% 97 84.0 75.8
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 22,753 29.4% 8,599 37.8% 6 241.5 2114.6
Single 54,544 70.6% 17,491 32.1% 16 797.8 9986.2
PRESENT commands, by type:
MARC 29.3%
OPAC 31.8%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS