MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 11/03/01 through 11/09/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 38,359 2,011,720
MED90 7,105 92,969
MED85 5,707 36,714
MED80 5,189 19,798
MED75 5,035 11,748
MED66 5,065 14,359
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,605 69,607
2-4 a.m. 743 58,956
4-6 a.m. 414 18,655
6-8 a.m. 918 22,046
8-10 a.m. 4,730 163,693
10-12 a.m. 10,655 371,713
12-2 p.m. 12,345 333,097
2-4 p.m. 12,840 403,146
4-6 p.m. 10,754 346,460
6-8 p.m. 5,360 196,593
8-10 p.m. 3,479 112,774
10-12 p.m. 2,617 90,568
__________ _____________ _________________
Total: 66,460 2,187,308
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 353
Davis 539
Irvine 131
Los Angeles 584
Riverside 15
San Diego 361
San Francisco 620
Santa Barbara 31
Santa Cruz 14
Lawrence Berkeley 2
Lawrence Livermore 30
Los Alamos 0
MELWEB 0
Searchlight 12,144
Other - UC 51,252
Other-Network UC 384
_____
66,460
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 9,278
Davis 4,602
Irvine 857
Los Angeles 2,898
Riverside 56
San Diego 3,021
San Francisco 9,259
Santa Barbara 72
Santa Cruz 8
Lawrence Berkeley 1
Lawrence Livermore 768
Los Alamos 0
MELWEB 0
Searchlight 0
Other - UC 2,150,460
Other-Network UC 6,028
_____
2,187,308
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 2.8
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) 20:25
Average session length (minutes:seconds) 15:23
Longest session recorded (minutes:seconds) 210:48
Average number of searches completed per session 0.0
Retrievals per search - median 2.0
Retrievals per search - average 392.3
Retrievals per search - standard deviation 3599.0
Percent of searches completed with 0 results 36.4%
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 66,460 13.9%
PRESENT 380,377 79.4%
INIT or CLOSE 31,728 6.6%
OTHER 181 0.0%
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 3,840 4.2% 1,474 38.4% 5 1375.0 5512.1
PERSONAL AUTHOR 17,347 18.9% 5,112 29.5% 7 83.8 818.6
TITLE WORD 8,151 8.9% 3,359 41.2% 3 197.7 2083.8
SUBSET 137 0.1% 50 36.5% 14 93.5 238.3
SUBJECT WORD 94 0.1% 35 37.2% 18 318.5 1625.8
SUBJECT 1,475 1.6% 755 51.2% 48 773.8 4707.1
EXACT SUBJECT 3,493 3.8% 1,064 30.5% 35 597.0 3192.4
MAJOR SUBJECT 155 0.2% 39 25.2% 36 432.4 1211.2
EXACT MAJOR SUBJ 286 0.3% 56 19.6% 34 302.7 919.2
EXACT TITLE 815 0.9% 428 52.5% 1 18.9 173.1
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 980 1.1% 271 27.7% 277 1424.4 2985.3
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 7 0.0% 7 100% 0 0.0 0.0
KEYWORD 41,324 44.9% 15,839 38.3% 18 750.0 5355.7
DATE 1,357 1.5% 325 23.9% 6 119.1 658.7
LANGUAGE 4,613 5.0% 1,370 29.7% 30 487.5 2386.8
UNIQUE ID 109 0.1% 55 50.5% 1 1.1 0.3
ADDED 861 0.9% 520 60.4% 5 49.3 247.7
PUB TYPE 1,808 2.0% 365 20.2% 27 190.2 662.6
AUTHOR AFFIL. 505 0.5% 197 39.0% 12 202.7 1665.8
CHEMICAL NAME 1 0.0% 0 0.0% 2 2.0 0.0
EXACT CHEMICAL 4 0.0% 2 50.0% 151 150.5 16.3
AT 4,030 4.4% 1,415 35.1% 21 961.4 5212.7
AGE 245 0.3% 61 24.9% 46 270.0 796.7
ISN 0 0.0% 0 0.0% 0 0.0 0.0
ARTICLE 145 0.2% 24 16.6% 122 619.0 1918.3
XXS 86 0.1% 57 66.3% 43 328.2 608.6
XMXS 62 0.1% 25 40.3% 17 192.0 505.2
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 42 0.0% 36 85.7% 461 401.2 305.2
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 17,108 25.7% 5,955 34.8% 8 365.1 2891.4
Single 49,352 74.3% 18,221 36.9% 17 706.8 4943.7
PRESENT commands, by type:
MARC 28.9%
OPAC 30.0%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS