MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 06/16/01 through 06/22/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 35,575 1,893,642
MED90 7,110 120,613
MED85 5,497 53,201
MED80 4,760 26,822
MED75 4,490 18,112
MED66 4,650 15,808
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,454 51,271
2-4 a.m. 268 11,633
4-6 a.m. 219 16,533
6-8 a.m. 1,208 44,055
8-10 a.m. 5,055 181,682
10-12 a.m. 11,016 406,597
12-2 p.m. 11,175 360,996
2-4 p.m. 13,028 410,145
4-6 p.m. 10,514 323,561
6-8 p.m. 3,679 134,383
8-10 p.m. 2,827 102,680
10-12 p.m. 1,639 84,662
__________ _____________ _________________
Total: 62,082 2,128,198
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 375
Davis 669
Irvine 91
Los Angeles 269
Riverside 27
San Diego 390
San Francisco 1,193
Santa Barbara 20
Santa Cruz 20
Lawrence Berkeley 71
Lawrence Livermore 4
Los Alamos 6
MELWEB 14,844
Searchlight 4,652
Other - UC 39,191
Other-Network UC 260
_____
62,082
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 7,582
Davis 6,655
Irvine 4,037
Los Angeles 3,359
Riverside 193
San Diego 3,240
San Francisco 9,672
Santa Barbara 152
Santa Cruz 98
Lawrence Berkeley 865
Lawrence Livermore 54
Los Alamos 19
MELWEB 588,403
Searchlight 11,084
Other - UC 1,490,277
Other-Network UC 2,508
_____
2,128,198
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 0.7
Standard deviation in seconds 2.4
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) 21:39
Average session length (minutes:seconds) 20:43
Longest session recorded (minutes:seconds) 252:48
Average number of searches completed per session 0.0
Retrievals per search - median 2.0
Retrievals per search - average 411.8
Retrievals per search - standard deviation 7563.8
Percent of searches completed with 0 results 33.9%
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 62,082 13.3%
PRESENT 379,983 81.2%
INIT or CLOSE 25,374 5.4%
OTHER 314 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 4,066 4.8% 1,527 37.6% 4 1458.9 21252.4
PERSONAL AUTHOR 20,646 24.6% 5,910 28.6% 7 102.2 1320.2
TITLE WORD 7,297 8.7% 3,027 41.5% 2 298.0 7148.0
SUBSET 108 0.1% 24 22.2% 15 108.2 258.4
SUBJECT WORD 91 0.1% 57 62.6% 12 2935.4 14095.5
SUBJECT 1,550 1.8% 826 53.3% 15 649.5 3957.1
EXACT SUBJECT 2,712 3.2% 674 24.9% 27 513.1 4270.6
MAJOR SUBJECT 90 0.1% 21 23.3% 8 554.5 1986.6
EXACT MAJOR SUBJ 242 0.3% 70 28.9% 15 175.1 677.3
EXACT TITLE 499 0.6% 311 62.3% 1 4.5 14.7
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 805 1.0% 235 29.2% 497 1985.8 3833.4
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 22 0.0% 6 27.3% 40 55.4 44.7
KEYWORD 34,857 41.5% 12,345 35.4% 15 777.6 10125.6
DATE 1,571 1.9% 238 15.1% 4 104.7 1106.6
LANGUAGE 3,611 4.3% 907 25.1% 25 362.2 2383.9
UNIQUE ID 163 0.2% 85 52.1% 1 1.0 0.2
ADDED 1,032 1.2% 473 45.8% 5 14.3 25.9
PUB TYPE 1,926 2.3% 438 22.7% 23 143.0 554.3
AUTHOR AFFIL. 490 0.6% 197 40.2% 12 323.8 2032.6
CHEMICAL NAME 9 0.0% 7 77.8% 10 9.5 10.6
EXACT CHEMICAL 9 0.0% 7 77.8% 10 9.5 12.0
AT 1,849 2.2% 611 33.0% 19 397.1 2157.9
AGE 97 0.1% 24 24.7% 16 114.9 212.4
ISN 1 0.0% 1 100% 0 0.0 0.0
ARTICLE 43 0.1% 12 27.9% 44 249.2 421.8
XXS 161 0.2% 52 32.3% 8 424.6 1766.6
XMXS 64 0.1% 9 14.1% 14 141.2 292.8
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 18 0.0% 13 72.2% 3 6.4 6.1
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 16,139 26.0% 5,401 33.5% 6 242.6 4773.0
Single 45,943 74.0% 15,669 34.1% 15 758.4 10440.0
PRESENT commands, by type:
MARC 27.9%
OPAC 31.7%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS