MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 11/10/01 through 11/16/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 32,807 1,798,267
MED90 6,933 96,382
MED85 5,646 43,681
MED80 5,154 22,724
MED75 4,897 15,070
MED66 4,991 16,592
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,656 65,090
2-4 a.m. 607 28,947
4-6 a.m. 235 15,406
6-8 a.m. 980 43,465
8-10 a.m. 4,070 169,862
10-12 a.m. 9,135 292,786
12-2 p.m. 10,535 340,379
2-4 p.m. 12,618 398,225
4-6 p.m. 9,417 301,278
6-8 p.m. 5,107 145,750
8-10 p.m. 3,487 107,901
10-12 p.m. 2,581 83,627
__________ _____________ _________________
Total: 60,428 1,992,716
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 272
Davis 240
Irvine 59
Los Angeles 566
Riverside 22
San Diego 260
San Francisco 741
Santa Barbara 108
Santa Cruz 15
Lawrence Berkeley 76
Lawrence Livermore 2
Los Alamos 0
MELWEB 0
Searchlight 12,692
Other - UC 44,847
Other-Network UC 528
_____
60,428
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 2,549
Davis 3,249
Irvine 832
Los Angeles 4,295
Riverside 274
San Diego 1,542
San Francisco 8,813
Santa Barbara 341
Santa Cruz 88
Lawrence Berkeley 665
Lawrence Livermore 18
Los Alamos 0
MELWEB 0
Searchlight 0
Other - UC 1,963,514
Other-Network UC 6,536
_____
1,992,716
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 2.5
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) 20:01
Average session length (minutes:seconds) 14:33
Longest session recorded (minutes:seconds) 191:22
Average number of searches completed per session 0.0
Retrievals per search - median 2.0
Retrievals per search - average 497.4
Retrievals per search - standard deviation 5888.2
Percent of searches completed with 0 results 36.6%
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 60,428 13.8%
PRESENT 347,517 79.3%
INIT or CLOSE 30,015 6.8%
OTHER 530 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 3,366 4.1% 1,369 40.7% 5 1264.2 7775.8
PERSONAL AUTHOR 15,204 18.3% 4,391 28.9% 7 93.5 818.7
TITLE WORD 6,847 8.2% 2,672 39.0% 3 227.0 2624.2
SUBSET 108 0.1% 23 21.3% 37 189.3 450.4
SUBJECT WORD 96 0.1% 52 54.2% 14 243.8 622.6
SUBJECT 1,370 1.6% 748 54.6% 39 982.8 4677.7
EXACT SUBJECT 2,938 3.5% 720 24.5% 37 656.9 4391.8
MAJOR SUBJECT 146 0.2% 57 39.0% 32 689.5 3213.8
EXACT MAJOR SUBJ 235 0.3% 43 18.3% 22 327.9 2059.1
EXACT TITLE 532 0.6% 340 63.9% 1 41.7 416.2
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 738 0.9% 189 25.6% 343 1749.3 3727.4
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 6 0.0% 4 66.7% 3 2.5 2.1
KEYWORD 38,721 46.6% 15,017 38.8% 18 1008.2 8945.9
DATE 1,577 1.9% 371 23.5% 5 123.4 872.0
LANGUAGE 4,258 5.1% 1,136 26.7% 31 472.3 3942.8
UNIQUE ID 102 0.1% 68 66.7% 1 1.2 0.4
ADDED 748 0.9% 268 35.8% 6 27.6 78.7
PUB TYPE 1,725 2.1% 425 24.6% 30 204.6 1161.5
AUTHOR AFFIL. 553 0.7% 271 49.0% 10 50.0 191.6
CHEMICAL NAME 7 0.0% 2 28.6% 2 2.6 2.5
EXACT CHEMICAL 0 0.0% 0 0.0% 0 0.0 0.0
AT 3,325 4.0% 1,056 31.8% 28 731.3 3999.9
AGE 195 0.2% 43 22.1% 18 169.4 471.3
ISN 0 0.0% 0 0.0% 0 0.0 0.0
ARTICLE 133 0.2% 16 12.0% 78 588.5 2403.5
XXS 44 0.1% 22 50.0% 9 89.3 165.5
XMXS 19 0.0% 10 52.6% 12 29.6 39.4
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 32 0.0% 30 93.8% 5 5.0 4.2
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 14,988 24.8% 4,958 33.1% 8 343.2 3317.7
Single 45,440 75.2% 17,162 37.8% 16 941.1 8353.9
PRESENT commands, by type:
MARC 26.5%
OPAC 32.3%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS